Bur on concrete Plank Deck - T. Clear Corporation...2016/03/03 · Bur on concrete Plank Deck General On non nailable decks, a 3-ply membrane constructed with fiberglass felts is

Bur on concrete Plank Deck General On non nailable decks, a 3-ply membrane constructed with fiberglass felts is mopped to the deck in shingle fashion. This is covered with Lightguard Ballasted Roof Insulation. All installations of the Lightguard system must be in accordance with current specifications approved by T. Clear, installed by a T. Clear approved contractor, and will be covered by a warranty from Clear.

Deck condition The erection and design properties for performance of the deck are not the responsibility of T. Clear Corporation and should be in accordance with applicable regulatory agency requirements and industry standards.

The deck units shall be tightly butted to adjacent units and shall be properly attached and aligned. All side joints between planks shall be key grouted to prevent differential movement and to compensate for misalignment (max 1/2 11

).

Camber differential between adjacent tees of more than 1/ 411 must be corrected before roofing by placing grout between the adjacent members on a slope of 1 inch per foot feathered out onto the low tee. Grout installation should be smooth without ridges or irregularities. The deck units shall be directly welded to adjacent units. The deck surface must be dry and smooth.

If filler materials are added above the structural deck system, a 2-ply, 18 11 wide slip sheet ASTM D 2170-89, type IV is required at the end of each abuttment of the concrete tees. This slip sheet is installed over the filler materials.

2-ply dry-applied fiberglass felt

Fiberglass felt ASTM D-2178-89 type IV

Deck Slope Requirements Roofs must be designed and constructed to drain water within 48 hours after a rain. A 1I4 11 per foot slope is recommended. 11 Dead level 11 decks of this construction are acceptable with a sufficient number of correctly placed drains. Where a negative slope exists, consideration may be given to increasing the thickness of the insulation over the membrane to displace water. The drain body must be recessed into the deck so that the clamping ring is flush with or below the deck surface. Sumps are recommended.

The maximum slope that will be covered by Lightguard roof insulation systems is 2 inches per foot and requires the use of ASTM D 312-89, type Ill asphalt. (Note: Type Ill asphalt is

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the preferred asphalt for all slopes.) ASTM D 312-89, type II asphalt may be used for slopes not to exceed 1 inch per foot. ASTM D 312-89, type I may be used for slopes not to exceed 1/2 11 per foot when covered with a minimum 6 mil polyethylene sheet to completely cover the asphalt so as not to come in contact with the Lightguard panel.

Built-Up Roof Installation Sweep the deck free of dust and debris. Prime the concrete surface with asphalt concrete primer (ASTM D41-7 8) at a rate of one gallon per square. Allow the primer to dry to the touch before continuing with the application of the built-up roof.

Starting at the low point of the roof, if the deck is sloped, uniformly mop the primed surface with steep asphalt (ASTM D-312, type Ill) at the rate of 25-30 lb. per square. While hot, embed three plies of fiberglass felt (ASTM D-2178, type IV) in shingle fashion, lapping each sheet 24 2/311

•

Interply moppings shall be continuous. Complete embedment of felts is required and accomplished by dragging a broom or squeegee over the felt, no more pressure is required than that exerted by the weight of the 11 brooming 11 utensil. During cold weather, effective brooming is essential to eliminate voids and to assure adhesion.

As the work progresses, full mop the surface of the membrane using a minimum coverage of 25-30 pounds per square of ASTM D-312, type Ill asphalt. Felt should never be exposed overnight or in inclement weather. Bitumen temperature at the kettle shall be controlled so as to not exceed the bitumen manufacturer's recommendations.

It is not acceptable to include any temporary membrane as a part of a completed membrane. Install completed membrane in final form on a day-to-day basis. If the slope of the deck is such that water might flow under the fastened fiberglass felt, temporary water cut-offs are necessary at the end of the workday. Water cut-offs must be removed prior to continuing the membrane application.

Flashing Installation Flashings should be of granule surfaced modified bitumen sheet adhered with ASTM D 312-89, type Ill asphalt or torch applied. All flashing must be completed in each area prior to installing Lightguard Ballasted Roof Insulation. Conform to details shown in architectural drawings, and install according to T. Clear flashing specifications. Non granule surfaced modified bitumen sheets may be used but require periodic maintenance due to weathering that is not included in the T. Clear warranty.

Other Relevant T. Clear Specifications For installation of Lightguard Ballasted Roof Insulation panels, see:

1. Lightguard installation, wind design, and securement specifications (LIDS 1993)

2. Lightguard flashing details (LFD 1993)

3. Lightguard roofing specifications for coal tar pitch bitumen membranes (CTPM 1993)

Fire Classification Information For Lightguard Roof Assemblies 1. All Lightguard assemblies are considered as ballasted systems with respect to Factory Mutual (F.M.). Refer to the current F.M. data sheet 1-29.

2. All Lightguard roof assemblies are rated Class A. (fire from without). Obtain specific: configuration details from Underwriter's Laboratory (U.L.) from the current roofing materials and Systems Directory.

3. For information on hourly rated constructions (fire from within) see the current U.L. Fire Resistance Directory.

irilC IE~ ~CORPORATION

P.O. Box 416 Hamilton, Ohio 45012

1-800-544-7398

NOTICE: T. CLEAR CORP. believes the infonnation and recommendations herein to be accLrate and re liable as of November 1990. However, since any assistance furnished by T. CLEAR CORP. with reference to the proper use and disposal of its products is provided without charge, and since use condltioos and disposal are not within its control, T. CLEAR CORP. assumes no obligation or liability for such assistance and does not guarantee results from use of such products or other information herein; no warrl>lty, express or implied, is given nor ~ freedom from any patent owned by T. CLEAR CORP. or others to be inferred. Information herein concemng laws and regulations is based on U. S. federal laws and regulations except where specific reference is made to those of other jurisdictions. Since use condltloos and governmental regulations may differ from one iocatioo to mther and may change with time, it is the Buyer's responsibility to determine whether T. CLEAR CORP.'S products are appropriate for Buyer's use, and to assure Buyer's workplace and disposal practices are in cornpli"1Cf with laws, regulations, ordin"1ces, and other governmental enactments applicable in the jurisdiction(s) having authority over Buyer's operations.

LIGHTGUARD" i• a ieglstered trademark of T. Clear Corporation.

Bur on Lightweight Insulating concrete Deck General On non nailable decks, a 3-ply membrane constructed with fiberglass felts is mopped to the deck in shingle fashion. This is covered with Lightguard Ballasted Roof Insulation. All installations of the Lightguard system must be in accordance with current specifications approved by T. Clear, installed by a T. Clear approved contractor, and will be covered by a warranty from Clear.

The mechanically attached specification utilizing the fiberglass base sheet and two shingled fiberglass felts for a nailable deck may be used when the lightweight insulating concrete is installed over a permeable form board or slotted metal deck.


In particular the deck shall be smooth, well troweled, and have no pronounced ridges or depressions. It must be dry and unfrozen at the time of roofing. Provisions must be made in the building design for all the water-based material to dry to the underside. The deck shall be considered not sufficiently dry if foaming occurs during application of the steep asphalt.

Fiberglass felt ASTM D -2178-89 type IV

Deck Slope Requirements Roofs must be designed and constructed to drain water within 48 hours after a rain. A 1I4 11 per foot slope is recommended. 11 Dead level 11 decks of this construction are acceptable with a sufficient number of correctly placed drains. Where a negative slope exists, consideration may be given to increasing the thickness of the insulation over the membrane to displace water. The drain body must be recessed into the deck so that the clamping ring is flush with or below the deck surface. Sumps are recommended.


The maximum slope that will be covered by Lightguard roof insulation systems is 2 inches per foot and requires the use of ASTM D 312-89, type Ill asphalt (Note: Type Ill asphalt is the preferred asphalt for all slopes.) ASTM D 312-89, type II asphalt may be used for slopes not to exceed 1 inch per foot. ASTM D 312-89, type I may be used for slopes not to exceed l/2 11 per foot when covered with a minimum 6 mil polyethylene sheet to completely cover the asphalt so as not to come in contact with the Lightguard panel.

Built-Up Roof Installation Sweep the deck free of dust and debris. Prime the concrete surface with asphalt concrete primer (ASTM D 41-78) at a rate of one gallon per square. Allow the primer to dry to the touch before continuing with the application of the built-up roof.

Starting at the low point of the roof, if the deck is sloped, uniformly mop the primed surface with steep asphalt (ASTM D-312, type Ill) at the rate of 25-30 lb. per square. While hot, embed three plies of fiberglass felt (ASTM D-217 8, type IV) in shingle fashion, lapping each sheet 2 4 2 /3 11

•

lnterply moppings shall be continuous. Complete embedment of felts is required and accomplished by dragging a broom or squeegee over the felt, no more pressure is required than that exerted by the weight of the "brooming" utensil. During cold weather, effective brooming is essential to eliminate voids and to assure adhesion.


It is not acceptable to include any temporary membrane as a part of a completed membrane. Install completed membrane in final form on a day-to-day basis. If the slope of the deck is such that water might flow under the secured fiberglass felt, temporary water cut-offs are necessary at the end of the workday. Water cut-offs must be removed prior to continuing the membrane application.

Flashing Installation Flashings should be of granule surfaced modified bitumen sheet adhered with ASTM D 312-89, type Ill asphalt or torch applied. All flashing must be completed in each area prior to installing Lightguard Ballasted Roof Insulation. Conform to details shown in architectural drawings, and install according to T. Clear flashing specifications. Non granule surfaced modified bitumen sheets may be used but require periodic maintenance due to weathering that is not included in the T. Gear warranty.





Fire Classification l1nformaeion For lightguard Roof Assemblies

1. All Lightguard assemblies are considered as ballasted systems with respect to Factory Mutual (F.M.). Refer to the current F.M. data sheet 1-29.

2. All Lightguard roof assemblies are rated Class A. (fire from without). Obtain specific configuration details from Underwriter's Laboratory (U.L.) from the current roofing materials and Systems Directory.

3. For information on hourly rated constructions (fire from within) see the current U.L. Rre Resistance Directory.

iriC IE'~ ~CORPORATION

P.O. Box416 Hamilton, Ohio 45012

1-800-544-7398

t«>TICE· T a.EAR CORP belie>es the infunnation and recoornendatlons herein to be aool'ate and reliable as of November 1990. However, silcu1y assistance. flrnished by T. a.EAR CORP. w:.;:=" to :r :'~and="' of its ~ ~provided withciut charge, and siu use c<nltians and disposal are not withil its control, T. ClIAR CORP. ilSSll11eS "'obligation or iabiity for sW1 ~m:e and ~ "!:""~ . based onU S federal laws~ ~ information hereil; 11> wilT111ty, expressor~.~~~istionfreedomSlnc lr001 ::!:"~bymmentalT. ~~~ ~othersy~~~~~~~ withtine~~s~todetemh whelherT. except where specific reference~ made to those of vu~r ,.._ s. e use c .,., gove ,.__u . . . · and othe 'ntat 1men!S applcable in the ''""""tion(s) havilg CLEAR CORP.'S products are appropriate for Buyer's use, and to assure Buyer's worl<place and disposal practices are in compliance with laws, regulations, ordinances, r goverrme enac ,.. _ authority over Buyer's operations.

LIGKTGUARD0

io a regiolor9d - al T. CIMr Cooporatlon.

J a ,.:

!

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Built-Up Roof Installation Sweep the deck free of dust and debris. Prime the concrete surface with asphalt concrete primer (ASTM D41-78) at a rate of one gallon per square. Allow the primer to dry to the touch before continuing with the application of the built-up roof.

Starting at the low point of the roof, if the deck is sloped, uniformly mop the primed surface with steep asphalt (ASTM D-312, type Ill) at the rate of 25-30 lb. per square. While hot, embed three plies of fiberglass felt (ASTM D-2178, type IV) in shingle fashion, lapping each sheet 24 2/3 11

•

lnterply moppings shall be continuous. Complete embedment of felts is required and accomplished by dragging a broom or squeegee over the felt, no more pressure is required than that exerted by the weight of the 11 brooming 11 utensil. During cold weather, effective brooming is essential to eliminate voids and to assure adhesion.


It is not acceptable to include any temporary membrane as a part of a completed membrane. Install completed membrane in final form on a day-to-day basis. tf the slope of the deck is such that water might flow under the secured fiberglass felt, temporary water cut-offs are necessary at the end of the workday. Water cut-offs must be removed prior to continuing the membrane application.






Fire Classification Information For Lightguard Roof Assemblies




lie• E~ CORPORATION


1-800-544-7398 l«JTICE: T. a.EAR CORP. beleves the ilformatiln and recommendations hen!il ID be aca.-ate and relabte as of Nowmber 1990. However, sia any assistne 11..-ished by T. CLEAR CORP. with reference ID the proper use and cisposal ol Its products is provided wittwt charge, and !ince use cOldtilns and disposal are 1111 withil Its cootrut, T. a.EAR CORP. as5lllleS oo OOligation or ialJity for !UCll assirunce and does 1111 giwantee results !nm use ol !UCll products or other information hereil; oo warrilrty, express or ir!*d. is given nor is freedom !nm any patent owned by T. a.EAR CORP. or otheB ID be im.n.d. lnlmnation herm concemilg laws and r~ is based on U. S. federal laws and r~ except when! specific reference is made ID those of other jurisdictions. Silce use cOldtilns and govenmental ~ may differ !nm one location ID another and may cha1ge with tine, It is the Buyer's responsilillty ID dettrmile whether T. a.EAR CORP.'S procb:ts are awopriate lor Buyer's use, and to assll"e Buyer's wortqilace and cisposal practices are in rompli"1Ce with laws, re~tions. ordinances, and other governmental enactments applicable 11 the jo.risdlction(s) havilg authority over Buyer's operations.

LIGHTGUARD0 ie a reglatered trademarl< ot T. Clear Coiporallon.

Bur on Poured Gypsum concrete Deck General On nailable decks, a 3-ply membrane is constructed with a mechanically attached fiberglass base sheet and two plies of fiberglass felt mopped to the base sheet in shingle fashion. This is covered with Lightguard Ballasted Roof Insulation. The mechanical fasteners will be those recommended for this type of deck, and in the pattern specified. All installations of the Lightguard system must be in accordance with current specifications approved by T. Clear, installed by a T. Clear approved contractor, and will be covered by a warranty from Clear.


In particular the deck shall be smooth, well troweled, and have no pronounced ridges or depressions. It must be dry and unfrozen at the time of roofing. Provisions must be made in the building design for the water-based material to dry to the underside. The deck shall be considered not sufficiently dry if foaming occurs during application of the steep asphalt. The deck must not be primed.

Deck Slope Requirements Roofs must be designed and constructed to drain water within 48 hours after a rain. A 1I 4 11 per foot slope is

~1 900 1~ ----i i-- Fiberglass felt

ASTM D-2178-89 type IV

recommended. 11 Dead level" decks of this construction are acceptable with a sufficient number of correctly placed drains. Where a negative slope exists, consideration may be given to increasing the thickness of the insulation over the membrane to displace water. The drain body must be recessed into the deck so that the clamping ring is flush with or below the deck surface. Sumps are recommended.

The maximum slope that will be covered by Lightguard roof insulation systems is 2 inches per foot and requires the use of ASTM D 312-89, type Ill asphalt. (Note: Type Ill asphalt is the preferred asphalt for all slopes.) ASTM D 312-89, type II asphalt may be used for slopes not to exceed 1 inch per foot. ASTM D 312-89, type I may be used for slopes not to exceed l /2 11 per foot when covered with a minimum 6 mil polyethylene sheet to completely cover the asphalt so as not to come in contact with the Lightguard panel.


Built-Up Roof Installation Sweep the deck free of dust and debris.

Starting at the low point of the roof, lay one ply of fiberglass base sheet, ASTM D-4897, type II non perforated, lapping the side joints 2 11 and the end joints 4 11

• Mechanically fasten along the laps at maximum 911 intervals and at the center of the she~t at 18 11 intervals using fasteners approved by the deck manufacturer for use in this application. Uniformly mop the attached fiberglass base sheet with steep asphalt (ASTM D-312, type Ill) at the rate of 25-30 lb. per square. While hot, embed two plies of fiberglass felt (ASTM D-2178, type IV) in shingle fashion, lapping each sheet 19 inches.

lnterply moppings shall be continuous. Complete embedment of felts is required and accomplished by dragging a broom or squeegee over the felt, no more pressure is required than that exerted by the weight of the 11 brooming 11 utensil. During cold weather, effective brooming is essential to eliminate voids and to assure adhesion.


It is not acceptable to include any temporary membrane as a part of a completed membrane. Install completed membrane in final form on a day-to-day basis. If the slope of the deck is such that water might flow under the secured fiberglass felt, temporary water cut-offs are necessary at the en~ of the workday. Water cut-offs must be removed prior to continuing the membrane application.

Flashing Installation

Flashings should be of granule surfaced modified bitumen sheet adhered with ASTM D 312-89, type Ill asphalt or torch applied. All flashing must be completed in each area prior to installing Lightguard Ballasted Roof Insulation. Conform to details shown in architectural drawings, and install according to T. Clear flashing specifications. Non granule surfaced modified bitumen sheets may be used but require periodic maintenance due to weathering. This maintenance is not included in the T. Clear warranty.





Fire Classification 111for1mation For lightguard Roof Assemblies




[j <=' E~ CORPOR AT I O N


1-800-544-7398

NOTICE: T. ClIAR CORP. beleves lhe i1fonnation and recommendations hereil to be acC1 .. te and reiable as of Novermer 1990. However, silce illY assistance funished by T. ClIAR CORP. with reftmlce to the prqier use and cl5po5al al its pnl<b:ts is pnMded without charge, and si1ce use c:onilions and cl5po5al are not within its control, T. ClIAR CORP. assi.mes no obligation or iabity for such ~lilnce and does not !JllJ(anlee r~ from use of such pnl<b:ts or other informatiln herei1; no w..,.anty, express or~ is~ nor is freedom from illy patent owned by T. ClIAR CORP. or olhers to be inferred. Information hereil concerning laws and regiNtions is based on U. S. federal laws and regiNtions except where specific reference is made to those of olher jllis<lc1ions. Silce use conditions and -nmental regiNtions may dfler from one location to another and may change with tine, n is lhe Buyer's rtspOnSiJlty to detmrine whether T. CLEAR CORP.'S prolbcts are awopriate for Buyer's use, and to ass&l'e Buyer's -1<place and cl5po5al practices are i1 compi;n:e with laws, r~tions, ordilances, and other penmental enactments applicallle i1 lhe ;.is<lctiln(s) havi1g authority over Buyer's operations.

LIGHTGUARD0 11 a ~iltered trademark of T. Clear Corporation.

Bur on steel Decks, F.M.

General On non nailable decks, a 3-ply membrane constructed with fiberglass felts is mopped to the prepared deck in shingle fashion. This is covered with Lightguard Ballasted Roof, Insulation. All installations of the Lightguard system n{ust be in accordance with current specifications approved by T. Clear, installed by a T. Clear approved contractor, and will be covered by a warranty from Clear.


Deck shall be constructed per all latest Factory Mutual engineering recommendations, including: 1) Deck gauge shall be no lighter than 22 gauge, 2) Side and end joints shall be adequately lapped and welded with all loose and broken welds repaired prior to roofing, and 3) Decking must be adequately supported at all penetrations.

Deck Slope Requirements Roofs must be designed and constructed to drain water within 48 hours after a rain. A 1I 4 11 per foot slope is recommended. 11 Dead level 11 decks of this construction are acceptable with a sufficient number of correctly placed drains. Where a negative slope exists, consideration may be

Fiberglass felt ASTM D-2178-89 type IV

given to increasing the thickness of the insulation over the membrane to displace water. The drain body must be recessed into the deck so that the clamping ring is flush with or below the deck surface. Sumps are recommended.

The maximum slope that will be covered by Lightguard roof insulation systems is 2 inches per foot and requires the use of ASTM D 312-89, type Ill asphalt. (Note: Type Ill asphalt is the preferred asphalt for all slopes.) ASTM D 312-89, type 11 asphalt may be used for slopes not to exceed 1 inch per foot. ASTM D 312-89, type I may be used for slopes not to exceed l/2 11 per foot when covered with a minimum 6 mil polyethylene sheet to completely cover the asphalt so as not to come in contact with the Lightguard panel.


Installation Of Underlayment In all cases, gypsum board or Densdeck or other approved underlayment will be attached to metal deck in accordance with requirements of types and patterns of fasteners noted in the Factory Mutual Approval Guide (1-60 or 1-90 classification.)

Other Class 1 Roof constructions As an alternate to gypsum board, Factory Mutual Class 1 insulated steel deck roof construction is accomplished when the individual components of the roof system are as required in the Factory Mutual Approval Guide.


Starting at the low point of the roof, if the deck is sloped, uniformly mop the primed surface with steep asphalt (ASTM D-312, type Ill) at the rate of 25-30 lb. per square. While hot, embed three plies of fiberglass felt (ASTM D-2178, type IV) in shingle fashion, lapping each sheet 24 2/3".


As the work progresses, full mop the surf ace of the membrane using a minimum coverage of 25-30 pounds per square of ASTM D-312, type Ill asphalt. Felt should never be exposed overnight or in inclement weather. Bitumen temperature at the kettle shall be controlled so as to not exceed the bitumen manufacturer 's recommendations.



Other Relevant T. Clear Specifications For installation of Lightguard Ballasted Roof Insulation panels, see: 1. Lightguard installation, wind design, and securement specifications (LIDS 1993)



Fire Classification Information For Lightguard Roof Assemblies




NOTICE: T. CLEAR CORP. believes the information and reconvnendations herein to be accurate and reliable as of November 1990. However, •nee any as~stance furnished by T. CLEAR CORP. with reference to the proper use and disposal of its products ~ provided without charge, and since use conditions and disposal are not within its control, T. UEAR CORP. assumes no obligation or liability for such as•stance and does not guarantee results from use of such products or other information herein; no warranty, express or implied, is given nor~ freedom from any patent owned by T. CLEAR CORP. or others to be inferred. Information herein concerning laws and regulations is based on U.S. federal laws and regW!ions except where specific reference ~ made to those of other jurisdictions. Since use conditions and governnnental regulations may differ from one location to another and may change with time, ~is the Buyer's responsi>illty to determile whether T. CLEAR CORP.'S products are appropriate for Buyer's use, and to assure Buyer's worl<place and disposal practkes are in compliance with laws, regulations, ordinances, and other governmental enactments applkable in the jurisdktion(s) havilg authority over Buyer's operations.

LJGHTGUAA09

ls a registered trademark of T. Clear Corporation.

Bur on structural wood Fiber Deck General On nailable decks, a 3-ply membrane is constructed with a mechanically attached fiberglass base sheet and two plies of fiberglass felt mopped to the base sheet in shingle fashion. This is covered with Lightguard Ballasted Roof Insulation. The mechanical fasteners will be those recommended for this type of deck, and in the pattern specified. All installations of the Lightguard system must be in accordance with current specifications approved by T. Clear, installed by a T. Clear approved contractor, and will be covered by a warranty from Clear.


The structural wood fiber plank must be set level, aligned and carefully interlocked with all joints flush and even. Voids (gaps which are l/8 11 or greater) or thickness variations or projections which are 1/811 or greater between adjacent wood fiber planks shall be grouted and feathered smooth.

Deck Slope Requirements Roofs must be designed and constructed to drain water within 48 hours after a rain. A 1/ 4 11 per foot slope is recommended. 11 Dead level 11 decks of this construction are acceptable with a sufficient number of correctly placed

~1 9 " I.-drains. Where a negative slope exists, consideration may be given to increasing the thickness of the insulation over the membrane to displace water. The drain body must be recessed into the deck so that the clamping ring is flush with or below the deck surface. Sumps are recommended.

The maximum slope that will be covered by Lightguard roof insulation systems is 2 inches per foot and requires the use of ASTM D 312-89, type Ill asphalt. (Note: Type Ill asphalt is the preferred asphalt for all slopes.) ASTM D 312-89, type II asphalt may be used for slopes not to exceed 1 inch per foot. ASTM D 312-89, type I may be used for slopes not to exceed 1/2 11 per foot when covered with a minimum 6 mil polyethylene sheet to completely cover the asphalt so as not to come in contact with the Lightguard panel.



Starting at the low point of the roof, lay one ply of fiberglass base sheet, ASTM 3-4897, type II non perforated, lapping the side joints 2 " and the end joints 4". Mechanically fas ten along the laps at center of the sheet at 18" intervals using fasteners approved by the deck manufacturer for use in this application. Uniformly mop the attached fiberglass base sheet with steep asphalt (ASTM D-312, type Ill) at the rate of 25-30 lb. per square. While hot, embed two plies of fiberglass felt (ASTM D-2178, type IV) in shingle fashion, lapping each sheet 19 inches.




Flashing Installation Flashings should be of granule surface modified bitumen sheet adhered with ASTM D 312-89, type Ill asphalt or torch applied. All flashing must be completed in each area prior to installing Lightguard Ballasted Roof Insulation. Conform to details shown in architectural drawings, and install according to T. Clear flashing specifications. Non granule surfaced modified bitumen sheets may be used but require periodic maintenance due to weathering that is not included in the T. Clear warranty.





Fire Classification Information For lightguard Roof Assemblies




[j <:"' E~ CORPORATION


1-800-544-7398 NOTIQ: T. CLEAR CORP. believes the infurlTiiltion and recommendations herein to be accurate and reliable as of November 1990. However, since any assistance furnished by T. CLEAR CORP. with reference to the proper use and disposal of its products is provided without charge, and since use conditions and disposal are not within its control, T. CLEAR CORP. assumes no obligation"' liability for such assistance and does not guarantee results from use of such products"' other information herein; no warranty, express Of impl~d, is given nor is freedom frOfO any patent owned by T. CLEAR CORP. Of others to be inferred. Information herein concerring laws and regulations is based on U.S. federal laws and regulations except where specific reference is made to those of other jurisddions. Since use cond~ions and governmental regulations may differ from one location to another and may chiVlQe with time, it is the Bllyer's responsibility to determine whether T. CLEAR CORP.'S products are appropriate fOf Buyer's use, and to assure Buyer's workplace and disposal practices are in cOfnpliance with laws, regulations, Ofdinances, and other governmental enactments applicable ~ the jurisdktion(s) having authority over Buyer's operations.

LIGHTGUARD<1 is a registered trademark of T. Clear Corporation.

Bur on wood & Plywood Deck General On nailable decks, a 3-ply membrane constructed with a mechanically attached fiberglass base sheet and two plies of fiberglass felt mopped to the base sheet in shingle fashion. This is covered with Lightguard Ballasted Roof Insulation. The mechanical fasteners will be those recommended for this type of deck, and in the pattern specified. All installations of the Lightguard system must be in accordance with current specifications approved by T. Clear, installed by a T. Clear approved contractor, and will be covered by a warranty from Clear.


The wood or plywood deck must be properly attached to supporting members and must be of sufficient thickness to prevent excessive deflection between supporting members. Wood roof decks shall consist of well-seasoned lumber

' edges of which shall be tongued and grooved, ship-lapped or splined to prevent differential flexing of the boards. Any significant voids shall be covered with sheet metal.

Deck Slope Requirements Roofs must be designed and constructed to drain water within 48 hours after a rain. A 1/ 411 per foot slope is recommended. 11 Dead level 11 decks of this construction are

Sheathing paper --i 9 .. L-_ for wood plank nail - I 1-- ··

as necessary

acceptable with a sufficient number of correctly placed drains. Where a negative slope exists, consideration may be given to increasing the thickness of the insulation over the membrane to displace water. The drain body must be recessed into the deck so that the clamping ring is flush with or below the deck surface. Sumps are recommended.

The maximum slope that will be covered by Lightguard roof insulation systems is 2 inches per foot and requires the use of ASTM D 312-89, type Ill asphalt. (Note: Type Ill asphalt is the preferred asphalt for all slopes.) ASTM D 312-89, type 11 asphalt may be used for slopes not to exceed 1 inch per foot. ASTM D 312-89, type I may be used for slopes not to exceed l /2 11 per foot when covered with a minimum 6 mil polyethylene sheet to completely cover the asphalt so as not to come in contact with the Lightguard panel.



Cover the deck with sheathing paper weighing approximately 5 lbs. per 100 square feet where necessary. Lap each sheet a minimum of 2 " and mechanically attach to deck sufficiently to hold in place. Sheathing paper may be omitted for plywood decks.

Starting at the low point of the roof, lay one ply of fiberglass base sheet, ASTM D-4897, type II non perforated, lapping the side joints 2 " and the end joints 4 ". Mechanically fasten along the laps at maximum 9" intervals and at the center of the sheet at 18" intervals using fasteners approved by the deck manufacturer for use in this application. Uniformly mop the attached fiberglass base sheet with steep asphalt (ASTM D-312, type Ill) at the rate of 25-30 lb. per square. While hot, embed two plies of fiberglass felt (ASTM D2178, type IV) in shingle fashion, lapping each sheet 19 inches.

lnterply moppings shall be continuous. Complete embedment of felts is required and accomplished by dragging a broom or squeegee over the felt, no more pressure is . required than that exerted by the weight of the "brooming" utensil. During cold weather, effective brooming is essential to eliminate voids and to assure adhesion.


It is not acceptable to include any temporary membrane as a part of a completed membrane. Install completed membrane in final form on a day-to-day basis. If the slope of the deck is such that water might flow under the fastened fiberglass felt, temporary water cut-offs are necessary at the end of the workday. Water cut-offs must be removed prior to continuing the membrane application.


Other Relevant T.. Clear Specifications For installation of Lightguard Ballasted Roof Insulation panels, see: 1. Lightguard installation, wind design, and securement specifications (LIDS 1993)



Fire Classification I nform,ation For Lightguard Roof Assemblies

1. All Lightguard assemblies are considered as ballasted systems with respect to Factory Mutual (F.M.). Refer to the current F.M. data sheet 1-29. 2. All Lightguard roof assemblies are rated Class A. (fire from without). Obtain specific configuration details from Underwriter's Laboratory (U.L.) from the current roofing materials and Systems Directory. 3. For information on hourly rated constructions (fire from within) see the current U.L. Fire Resistance Directory.

NOTICE: T. CLEAR CORP. believes the infonnation and recommeooations herein to be accurate and reliable as of November 1990. However, since any assistance fumished by T. CLEAR CORP. with reference to the proper use and disposal of its products. is pro~ed without charge, and~~·~ c~!tions and disposal are rot within its control, T. CLEAR CORP. assumes no obligation or liabUlty for such ~stance and does not guarantee results from use of such products or other informatiOn herem;,oo warranty, .express or implied, IS gi~n ~IS freedc?m from any l?itent owned by T. CLEAR CORP. or others to be inferred. Information herein concemlng laws and regulations Is based on U.S. federal laws and regulations except where specific reference is made to those of other /.msdictions. Since use conditions aoo governmental regulatK>ns may differ from one iocatK>n to another and may change with time it is the Buyer's responsibility to determine whether T. CLEAR CORP.'S products are. appropriate for Buyer's use, aoo to assure Buyer's workplace and disposal practices are in compliance with laws, regulations, ordinances, and other governmental enactments appl~able in the jurisdktion(s) having authority over Buyer's operatoos.

LIGHTGUAR09 is a registered trademark of T. Clear Corporation.

Air Barrier RequirementsLoose laid and mechanically attached EPDM membranes,require a substrate that qualifies as an air barrier. T. ClearTechnical Sheet #20 identifies the preparation required foreach type of deck where an air barrier is required.

Deck ConditionThe erection and design properties for performance of thedeck are not the responsibility of T. Clear Corporation andshall be in accordance with applicable regulatory agencyrequirements and industry standards. Specific approveddecks are listed along with minimal requirements.1. Poured Concrete Decks: Reinforced concrete decks shallhave a minimum density of 150 lbs./cu. ft.. Structurallightweight concrete decks shall have a minimum density of100 lbs./cu. ft.. The deck shall be smooth and have nopronounced ridges or depressions. It must be dry andunfrozen at the time of roofing.2. Concrete Plank Decks: The deck units shall be tightlybutted to adjacent units and shall be properly attached andaligned. All side joints between planks shall be key groutedto prevent differential movement and to compensate formisalignment (max. 1/2"). Camber differential betweenadjacent tees of more than 1/4" must be corrected beforeroofing by placing grout between adjacent members on aslope of 1"/ft. feathered out to the lower tee. Grout instal-lation shall be smooth without ridges or irregularities. Thedeck units shall be directly welded to adjacent units. Thedeck surface must be dry and unfrozen at the time of roofing.If filler materials are added above the structural deck, a 2-ply18" wide ASTM D2170-89 type IV slip sheet is required atthe end of each abutment of the concrete tees over the fillermaterials. Use of key grouting, or a 12" wide modifiedbitumen (mopped or torched over the side joints between thedeck units) may be used to provide an air barrier.3. Poured Gypsum Concrete Decks: The deck shall besmooth, well troweled, and have no pronounced ridges ordepressions. It must be dry and unfrozen at the time ofroofing. Provisions must be made in the building design forthe water-based material to dry to the underside.4. Lightweight Insulating Concrete Decks: The deck shall besmooth, well troweled, and have no pronounced ridges ordepressions. It must be dry and unfrozen at the time ofroofing. Provisions must be made in the building design forthe water-based material to dry to the underside.5. All Steel Decks: The deck shall be constructed per currentSteel Deck Institute (SDI) standards, including:

1) Deck gauge shall be no lighter than 22 gauge.2) Side and end joints shall be adequately lapped, mechanically

fastened or welded with all loose and broken welds repairedprior to roofing.

3) Decking must be adequately supported at all penetrations.Gypsum board, Densdeck or other approved underlaymentshall be attached to metal deck in accordance with requiredfasteners, types and patterns listed in T. Clear’s UL classificationfor 60 psf or 90 psf., a minimum of one fastener per 2square feet.6. Wood Or Plywood Decks: The wood or plywood deck mustbe properly attached to supporting members and must be ofsufficient thickness (min. 15/32) to prevent excessive deflectionbetween supporting members and to provide fire classification.Wood roof decks shall consist of well-seasoned lumber, edgesof which shall be tongue and grooved, ship-lapped or splined toprevent differential flexing of the boards. Any significant voidsshall be covered with attached sheet metal.7. Structural Wood Fiber Decks: The structural wood fiberplank shall be set level, aligned and carefully interlocked withall joints flush and even. Voids (gaps which are 1/8" orgreater) or thickness variations and projections which are1/8" or greater between adjacent wood fiber planks shall begrouted and feathered smooth.8. Existing Built-Up Roof Membrane: A built-up roof with agravel surface shall have the loose gravel removed by the useof a power broom or vaccuum. If the bitumen surface is lessthan 2 years old or has been resurfaced within 2 years or is acoal-tar pitch surface, a slip sheet of 6 mil polyethylene maybe required. A separation board is required between thispreviously graveled surface and the new EPDM. Smoothsurfaced BUR may not require a separation board. The recoverspecification by T. Clear Corporation must be followed forrecovering existing built-up roof systems.

Deck Slope RequirementsRoofs must be designed and constructed to drain water within48 hours after a rain. A 1/4" per foot slope is recommended.“Dead level” decks of this construction are acceptable with asufficient number of correctly placed drains. Where a negativeslope exists, consideration may be given to increasing thethickness of the insulation over the membrane to displace thewater, or appropriate insulation can be added under themembrane to eliminate the negative slope condition. Thedrain body must be recessed into the deck so that the clamp-ing ring is flush with or below the deck surface. Sumps arerecommended. The maximum slope that will be covered byLightguard Protected Membrane Roof Insulation is 2" per foot.

Specification Requirements Common To All EPDM Installations–Loose Laid,Mechanically Attached and Fully AdheredThe following specifications provide the basis for the instal-lation of the EPDM membrane systems, and are extended bythe specifications of the manufacturer supplying the materialsfor the installation. The materials for the installation of themembrane system must be bought from a single membranemanufacturer.

1. Insulation Beneath The Membrane: Its is preferable not touse the insulation below the membrane. However, whenrequired for slope, tapered insulation such as extruded poly-styrene is recommended.

2. Seam Tape For EPDM Field Seams And Cover Tape ForFlashing Requirement: All EPDM specifications must useseam tape in the field of the roof and cover tape for allflashing details.

3. Placement: The membrane shall be loosely laid over theacceptable substrate (see Membrane Table #1). The mem-brane shall be allowed to relax a minimum 1/2 hour beforefinal positioning and seaming. With respect to the fully-adhered system, the membrane is partially removed from thesubstrate so that adhesive can be applied to the substrate.Cuts for penetrations and projections should be carefullyexecuted. The membrane shall be unrolled and positionedwith a minimum 3" overlap.

Laps shall be shingled with the slope of the roof, so as not todevelop buck water joints.

4. Seaming: The cleaned and primed overlapping sheets mustbe seamed with membrane supplier’s tape. The seams shall bechecked for continuity and integrity and repaired immediately.Where the edge of the tape does not extend outside the lap by-0 +1/4", the seams will be completed using membranemanufacturer’s seam sealant. All T-joints shall be coveredwith EPDM covered tape.

5. Termination And Securement: Membrane securementshall be provided at all membrane terminations at theperimeter of each roof level, section, curb flashing, skylight,expansion joint, interior wall, penthouse, etc.. Securement shallalso be provided at angle changes. Mechanical securement atterminations shall be sealed. Pull-out strengths of thesecurements shall be 100 lb/ lineal foot when tested by theprocedures described in the SPRI Wind Design Guide ForBallasted Single Ply Roofing Systems.

6. Base Flashings: The longest pieces of flashing materialthat are practical shall be used to minimize splices. Flashingsshall not be applied over thru-wall flashings or weep holes.When using EPDM flashing material on a vertical surface,the seam between the flashing and the main roof sheet mustbe completed before bonding the flashing to the verticalsurface. When using uncured flashing material on a verticalsurface, the flashing must be secured before the seambetween the main roof sheet and the flashing is completed.Flashing membrane shall extend a minimum 6" onto themain roof sheet beyond the mechanical securement. Careshould be taken to ensure that the flashing does not bridgewhere there is a change of direction (e.g., parapet meets theroof deck). The top of the installed flashings shall be fastenedunder metal counter flashing, coping cap or metal reglet. Themaximum distance between fasteners shall be 8" O.C. appliedthrough a continuous bar to a solid substrate.

7. Penetrations: All penetrations (pipes, supports, soil stacks,cold vents, etc.) passing through the roofing membraneshall be flashed. The flashing seal shall be made directly tothe penetration passing through the roofing system. Whenbonding directly to metal, clean and prime metal. Applybonding adhesive to bonding surfaces. Allow to dry to touch.Fold membrane material onto the metal without wrinkling.Roll entire surface to fully mate the materials. Premoldedand prefabricated flashings shall be used wherever theirinstallation is practical. In addition to adhesive bondingmechanical clamps shall be used to secure the top of theprefabricated flashing to the penetration. Pipe clusters andunusual shape penetrations that cannot be sealed withmembrane or other prefabricated flashings shall be sealedby surrounding them with pourable sealer in a new pitch pan.Water-shedding devices covering pipe clusters arerecommended.

8. Drains: Existing flashing and asphalt shall be removedproviding a clean, smooth surface on all materials betweenthe clamping ring and the drain base in preparation forsealant and membrane. Drain ring should be located at orbelow deck surface. The use of tapered insulation may benecessary to assure water draining. The seal between themembrane and the drain base shall be provided by sealantunder constant, even compression from the drain ring. It isrecommended that cracked roof drain bowls and roof drainsusing lead-packing, oakum or coal tar sealant be replacedwith new roof drains.

9. Gravel Stops: The membrane shall be attached to the out-side fascia of the building to a properly secured and treatedwood nailer. The membrane shall extend below and besealed to the wood nailer using a termination bar and undermembrane sealant. Care must be taken to insure that an airbarrier is installed according to Technical Note #20 fromT. Clear Corporation to prevent billowing of the membrane.10. Water Cut-Offs: Measures must be taken to ensure thatwater does not flow beneath the completed sections of thenew roofing system. Water cut-offs shall be provided on adaily basis and at the onset of inclement weather. Watercut-offs shall be removed before the resumption of work.

Attachment Of MembranesLoose Laid: The membrane will not be attached in the field ofthe roof. The substrate, if any, between the membrane and thestructural deck will not be mechanically attached unless it isrequired to meet air barrier requirements, as noted in T. ClearTechical Note #20. If multiple layers of insulation are usedbeneath the membrane, the insulation shall be secured withcompatible insulation adhesive to prevent movement.Mechanically Attached: The substrate for mechanically-attached membranes must be attached to the deck usingtypes of fasteners and patterns to meet the minimum require-ments identified in Factory Mutual’s Approval Guide for I-60or higher as required by the specification. The membrane shallbe attached using plate, bar anchor, or batten in seam systems,as selected in the designer specifications for the requirementsof 60 psf or greater, as specified. Through-membranepenetrating fastener systems and plate-bonded systems arenot approved by T. Clear .Fully Adhered: Over the properly installed and/or preparedsurface, fresh, properly stored contact-adhesive shall beapplied at the required rate for the substrate in smooth, evencoatings without voids, globs, puddles or similar irregularities.The coated substrate shall be allowed to completely drybefore positioning the membrane. The membrane shall beunrolled and positioned with proper overlap without stretchingor stressing the membrane during placement. Once in place,one half of the sheet shall be turned back and coated withadhesive. When the adhesive has dried sufficiently to producestrings when touched with a dry finger, roll the coatedmembrane onto the previously coated substrate, avoidingwrinkles. The bonded half of the sheet shall be pressed downwith a weighted foam-covered lawn roller. The remaining half

P.O. Box 416Hamilton, Ohio 45012

1-800-544-7398

NOTICE: T. CLEAR CORP. believes the information and recommendations herein to be accurate and reliable as of November 1990. However, since any assistance furnished by T. CLEAR CORP. with reference to the proper use and disposal of itsproducts is provided without charge, and since use conditions and disposal are not within its control, T. CLEAR CORP. assumes no obligation or liability for such assistance and does not guarantee results from use of such products or other informationherein; no warranty, expressed or implied, is given nor is freedom from any patent owned by T. CLEAR CORP. or others to be inferred. Information herein concerning laws and regulations is based on U. S. federal laws and regulations except where specificreference is made to those of other jurisdictions. Since use conditions and governmental regulations may differ from one location to another and may change with time, it is the Buyer’s responsibility to determine whether T. CLEAR CORP.’s products areappropriate for Buyer’s use, and to assure Buyer’s workplace and disposal practices are in compliance with laws, regulations, ordinances, and other governmental enactments applicable in the jurisdiction(s) having authority over Buyer’s operations.

©1997 Clear Corporation. LIGHTGUARD® is a registered trademark of T. Clear Corporation.

of the sheet shall then be folded back, coated and rolled usingthe same bonding procedure. Adjoining sheets shall beinstalled in the same manner. Minimum overlap shall be 3inches. Laps shall be shingled so as not to develop buck waterjoints with respect to the slope of the roof.Adhered with hot steep asphalt (Felt-Backed Membranes Only):For polyester felt-backed EPDM (ASTM D-312 Type III),asphalt may be used as the adhesive provided the substrate iscompatible with the asphalt. Asphalt shall be evenly appliedaccording to the membrane manufacturer’s specifications.The membrane is unrolled onto the asphalt-coated surfacewithin a time interval to permit the felt backing portion of themembrane to embed in the fluid asphalt coating. Thesucceeding rolls shall be applied in similar manner with theunbacked edge overlapping the preceding roll, shingled withthe slope of the roof. The sheet shall be pressed down with aroller to ensure that the membrane is embedded in the asphaltand seams shall be adhered with tape.

Lightguard InstallationTo complete T. Clear Protected Membrane Roof Systems usingLightguard Protected Membrane Roof Insulation panels, see:1. Lightguard installation, wind design and securementspecifications (LIDS 1994)2. Lightguard flashing details (LFD 1994)

Fire Classification Information For Lightguard Roof Assemblies1. All Lightguard assemblies are considered as ballastedsystems with respect to Factory Mutual. Refer to the currentF.M. Data Sheet 1-29.2. All Lightguard roof assemblies are rated Class A (FireFrom Without). Obtain specific configuration details fromUnderwriter’s Laboratory (UL) from the current RoofingMaterials And Systems Directory.3. For more information on the hourly rated constructions,(Fire From Within), see the current U.L. Fire Resistance Directory.

Modified Bitumen on concrete Plank Deck General T. Clear approves smooth surfaced, reinforced APP or SBS Modified Bitumen (see materials listing) for a 2 ply membrane. It is constructed by fully mopping a fiberglass (ASTM D-4601) or fully mopping/torching a modified bitumen base sheet to the substrate. Fully mop or torch smooth surfaced modified bitumen sheet(s) to the base sheet to complete the membrane. Minimum thickness of this system shall be 160 mils, not including the base sheet. This is covered with Lightguard® Ballasted Roof Insulation. All installations of the Lightguard system shall be in accordance with current specifications approved by T. Clear, installed by a T. Clear approved contractor, and will be covered by a warranty from T. Clear. All membrane and flashing materials used on a roof shall be supplied by a single manufacturer.

It is the contractors responsibility to operate in a safe manner. It is recommended that all roofing applicators attend a qualified educational program for torch applications such as those offered by RIEi or SERTA.

Deck condition The erection and design properties for performance of the deck are not the responsibility of T. Clear and should be in accordance with applicable regulatory agency requirements and industry standards. Prior to the commencement of work, all roof surfaces shall be approved by the T. Clear applicator.

The deck units shall be tightly butted to adjacent units and shall be properly attached and aligned. All side joints between planks shall be key grouted to prevent differential movement and to compensate for misalignment (max. 1/2''). Camber differential

between adjacent tees of more than 1/ 4" shall be corrected before roofing by placing grout between the adjacent members on a slope of 1 inch per foot feathered out to the low tee. Grout installation should be smooth without ridges or irregularities. The deck units shall be structurally attached to adjacent units. The deck surface shall be dry and smooth. A 2 ply, 18" wide slip sheet ASTM D 2170-89, type IV is required at the end of each abutment of the concrete tees or planks.

Deck Slope Requirements Roofs shall be designed and constructed to drain water within 48 hours after a rain. A II 4" per foot slope is recommended. "Dead level" decks of this construction are acceptable with a sufficient number of correctly placed drains. Where a negative slope exists, consideration may be given to increasing the thickness of the insulation over the membrane to displace water. The drain body shall be recessed into the deck so that the clamping ring is flush with or below the deck surface. Sumps are recommended. The maximum slope that will be covered by Lightguard roof insulation systems is 2 inches per foot. The use of ASTM D 312-89, type Ill asphalt is preferred for all slopes. Lower melt asphalt can be used for low or no-slope applications.

Modified Bitumen Roof Installation Sweep the deck free of dust and debris. Prime the concrete surface with asphalt concrete primer (ASTM D41-78) at a rate of one gallon per square. Do not prime the concrete tees or planks any closer than 8" from any end or side joints. Allow the primer to dry to the touch before continuing with the application of the modified bitumen membrane.


Hot Mopped Application Starting at the low point of the roof, with a 112 width sheet as the first sheet and following with full sheets, fully mop one layer of fiberglass (ASTM D-4601) or modified bitumen base sheet perpendicular to the slope, embedding it in ASTM D-312-89 type Ill asphalt, applied at the EVT of the asphalt and at a rate of 20-25 lbs. per square. Base sheets shall be lapped 2" on all sides and 4" at the ends. The end laps should be staggered no less than 12" apart. Mop the second sheet perpendicular to the slope, starting at the low point of the roof, as a full sheet. Fully mop the smooth surfaced modified bitumen embedding it in ASTM D-312-89 type Ill asphalt, applied at the EVT of the asphalt at a rate of 20-2 5 lbs. per square. A flow of at least a 1/ 4" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". If additional modified bitumen plies are used, they must be installed in shingle fashion.

Torched Application Starting at the low point of the roof, with a 112 width sheet as the first sheet crx1 following with full sheets, weld one layer of torchable modified bitumen base sheet over the roof starting at the low point and applying perpendicular to the slope. A flow of at least a 1/ 4" shall be obtained around all seams. Base sheets shall be lapped 2" on all sides and 4" at the ends. The end laps should be staggered no less than 12" apart.

Weld the second torchable smooth surf aced sheet perpendicular to the slope, starting at the low point of the roof, as a full sheet. A flow of at least a 1/ 4" shall be obtained around all seams. The top sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". If additional modified bitumen plies are used, they must be installed in shingle fashion.

Temporary Membrane It is not acceptable to include any temporary membrane as a part of a completed membrane. Install completed membrane in final form on a day-to-day basis. If the slope of the deck is such that water might flow under the secured modified bitumen membrane, temporary water cut--0ffs are necessary at the end of the workday. Water cut--0ffs shall be removed prior to continuing the membrane application.

Flashing Installation T. Clear flashing specifications call out granule surf aced modified bitumen sheets adhered with ASTM D-312-89, type Ill asphalt or torch applied. All flashings must be completed in each area prior to installing Lightguard Ballasted Roof Insulation. Conform to details shown in architectural drawings, and install according to T. Clear flashing specifications. Non granule surf aced modified bitumen sheets may be used, but require additional periodic maintenance due to weathering. Maintenance is not included in the T. Clear warranty.

Other Relevant T. Clear Specifications For installation of Lightguard Ballasted Roof Insulation panels, see: 1. Lightguard installation, wind design, and securement specifications (LIDS 1994) 2. Lightguard flashing details (LFD 1994)

Fire Classification Information For Ligbtguard Roof Assemblies 1. All Lightguard assemblies are considered as ballasted systems with respect to Factory Mutual (F.M.). Refer to current F.M. data sheet 1-29. 2. All Lightguard roof assemblies are rated Class A. (fire from without). Obtain specific configuration details from Underwriter's Laboratory (U.L.) from the current roofing materials and Systems Directory. 3. For information on hourly rated constructions (fire from without), see the current U.L. Fire Resistance Directory.

[iC:I E"'"~ CORPORATION

P.O.Box416 Hamilton, Ohio 45012

1-800-544-7398

NOTICE: T. a.EAR CORP. believes the infunnation and recommendations herein to be accurate and reliable as of November 1990. However, ~r<e any assistar<e furnished by T. CLEAR CORP. with referer<e to the proper use and disposal of il5 products is provided withwt charge, and ~r<e use conditioos and disposal are not within its cootrol, T. CLEAR CORP. assumes no obligatioo or liability for such a~star<e and does not guarantee results from use of such products or other infunnation herein; no warranty, expressed or implied, is given nor is freedom from any patent owned by T. CLEAR CORP. or othe" to be inferred. Information herein coocerning laws and regulatioos is based oo U. S. federal laws and regulations except where specific reference is made to those of other jurisdictions. Since use conditions and governmental regulations may differ from one locatioo to another and may change with time, it is the Buyer's responsibility to determine whether T. CLEAR CORP.'s products are appropriate for Buyer's use, and to assure Buyer's workplace and disposal practkes are in compliance with laws, regulatioos, ordinances, and other governmental enactments applicable in the jurisdictioo(s) having authority over Buyer's operations.

C1994 Clear (apll"ation. UGHTGUARIJ" is a registered trademarl< ol T. Clear (apll"ation.

Modified Bitumen on Lightweight Insulating concrete Deck General T. Clear approves smooth surfaced, reinforced APP or SBS Modified Bitumen (see materials listing) for a 2 ply membrane. It is constructed by mechanically attaching a modified bitumen base sheet. The mechanical fasteners will be those recommended for this type of deck, and in the pattern specified. Fully mop/torch modified bitumen sheet(s) to the secured sheet. Minimum thickness of this system shall be 160 mils not including the base sheet.

This specification, utilizing the modified bitumen base sheet on a nailable deck may be used when the lightweight insulating concrete is installed over a permeable form board or slotted metal deck. The completed membrane is covered with Lightguard® Ballasted Roof Insulation. All installations of the Lightguard system shall be in accordance with current specifications approved by T. Clear, installed by a T. Clear approved contractor, and will be covered by a warranty from T. Clear. All membrane and flashing materials used on a roof shall be supplied by a single manufacturer.


Deck condition The erection and design properties for performance of the deck are not the responsibility of T. Clear and should be in accordance with applicable regulatory agency requirements and industry standards. Prior to the commencement of work, all roof surf aces shall be approved by the T. Clear applicator.

In particular the deck shall be smooth, well troweled, and have no

pronounced ridges or depressions. It shall be dry and unfrozen at the time of roofing. Provisions shall be made in the building design for the water-based material to dry to the underside.

Deck Slope Requirements Roofs shall be designed and constructed to drain water within 48 hours after a rain. A 1/ 4" per foot slope is recommended. "Dead level" decks of this construction are acceptable with a sufficient number of correctly placed drains. Where a negative slope exists, consideration may be given to increasing the thickness of the insulation over the membrane to displace water. The drain body shall be recessed into the deck so that the clamping ring is flush with or below the deck surface. Sumps are recommended. The maximum slope that will be covered by Lightguard roof insulation systems is 2 inches per foot. The use of ASTM D 312-89, type 111

asphalt is preferred for all slopes. Lower melt asphalt can be used for low or no-slope applications.

Modified Bitumen Roof Installation Base Sheet Installation Sweep the deck free of dust and debris. Prime the deck with asphalt primer (ASTM D 41-78) at a rate of one gallon per square. Starting at the low point of the roof, with a 1/2 width sheet as the first sheet and following with full sheets, lay one ply of a modified bitumen base sheet perpendicular to the slope lapping the side joints 2" and end joints 4". Mechanically fasten along the laps at a maximum 9" intervals. Additional fasteners must be placed at the 1/3 points of the sheet in two rows which are staggered-fastened at 18" O.C. maximum. Fastener caps must be a minimum of 2" in diameter. The end laps must be staggered no less than 12" apart.


Hot Mopped Application Starting at the low point of the roof, mop the modified bitumen sheets to the base sheet The smooth surfaced modified bitumen sheets are applied perpendicular to the slope, with ASTM D-312-89 type Ill asphalt, applied at the EVT of the asphalt and at a rate of 20-25 lbs. per square. A flow of at least a 1/4" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". Minimum thickness of this system shall be 160 mils not including the base sheet. If additional modified bitumen plies are used to achieve the 160 mil thickness, they must be installed in shingle fashion.

Torched Application Starting at the low point of the roof, weld the torchable smooth surfaced modified bitumen sheets to the base sheet, perpendicular to the slope. A flow of at least a 1/ 4" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". Minimum thickness of this system shall be 160 mils not including the base sheet If additional modified bitumen plies are used to achieve the 160 mil thickness, they must be installed in shingle fashion.

Temporary Membrane It is not acceptable to include any temporary membrane as a part of a completed membrane. Install completed membrane in final form on a day-to-day basis. If the slope of the deck is such that water might flow under the secured modified bitumen membrane, temporary water cut-offs are necessary at the end of the workday. Water cut-offs shall be removed prior to continuing the membrane application.

Flashing Installation T. Clear flashing specifications call out granule surfaced modified bitumen sheets adhered wtth ASTM D-312-89, type Ill asphalt or torch applied. All flashings must be completed in each area prior to installing Lightguard Ballasted Roof Insulation. Conform to details shown in architectural drawings, and install according to T. Clear flashing specifications. Non granule surfaced modified bitumen sheets may be used, but require additional periodic maintenance due to weathering. Maintenance is not included in the T. Clear warranty.


1. Lightguard installation, wind design, and securement specifications (LIDS 1994) 2. Lightguard flashing details (LFD 1994)

Fire Classification Information For Lightguard Roof Assemblies 1. All Lightguard assemblies are considered as ballasted systems with respect to Factory Mutual (F.M.). Refer to current F.M. data sheet 1-29. 2. All Lightguard roof assemblies are rated Class A. (fire from without). Obtain specific configuration details from Underwriter's Laboratory (U.L.) from the current roofing materials and Systems Directory.

3. For information on hourly rated constructions (fire from without), see the current U.L. Fire Resistance Directory.

[j <=• E~ CORPORATION


1-800-544-7398

NOTICE: T. CLIAR CORP. believes the informatioo and reamnendations hereil to be acante and reiable as of Novetriler 1990. llowever, since any assistance furnished by T. CL£AR CORP. with reference to the proper use and disposal of its products~ proWled without charge, and silc:e use cOldtions and disposal are not withil its cmtrol, T. CL£AR CORP. ilSSlllleS oo obigation or liablily fur such ~lance and does not guar"1tee reSIAts from use of such prod..:ts or other informatioo hereil; oo warranty, expressed or ir!Jlied, ~given nor~ freedom Imm any patent owned by T. CL£AR CORP. or others to be inferred. Hormation hereil coocerrilg laws and regdations ~based oo U. S. fuderal laws and re~tioos except where specific reference~ made to those of other ;.isdictions. Si1ce use cmdilions and -mmental ~lions may <foffer Imm ooe locatioo to another and may change with time, ~ ~ the Buyer's re!j)Ollsibilily to determine whether T. CL£AR CORP.'s products are appropriate fur Buyer's use, and to asSll'e Buyer's worl<place and dOposal practices il'e in c~e with laws, re!JJatioos. ordinances, and other govemnental enactments applicable in the jurisdktioo(s) havilg authority over Buyer's operations

©1994 Clear Cnrporatioo. UGHTGUARD" Is a registered trademar1< of T. Clear Cnrporatioo.

·L.IGHTGUARD® Ballasted Roofing Systems

Modified Bitumen on Poured concrete Deck General T. Clear approves smooth surfaced, reinforced or non-reinforced APP or SBS Modified Bitumen (see materials listing) for a 1 or 2 ply membrane on poured structural concrete decks. A single-ply membrane is constructed by applying a modified bitumen sheet which is approved for single-ply applications (see materials listing). A 2 ply membrane is constructed by first attaching a fiberglass (ASTM 4601), or modified bitumen base sheet to the deck. This is followed by a minimum single-ply modified bitumen sheet mopped or torched to the base sheet. The completed membrane is covered with Lightguard® Ballasted Roof Insulation. All installations of the Lightguard system shall be in accordance with current specifications approved by T. Clear, installed by a T. Clear approved contractor, and will be covered by a warranty from T. Clear. All membrane and flashing materials used on a roof shall be supplied by a single manufacturer.



Reinforced concrete decks shall have a minimum density of 150 lbs./ cu. ft .. Structural lightweight concrete decks shall have a minimum density of 100 lbs./ cu. ft .. The deck shall be smooth and have no pronounced ridges or depressions. It shall be dry and unfrozen at

the time of roofing. The deck shall be considered not sufficiently dry if foaming occurs during application of the hot bitumen.

Deck Slope Requirements Roofs shall be designed and constructed to drain water within 48 hours after a rain. A 1/ 4" per foot slope is recommended. "Dead level" decks of this construction are acceptable with a sufficient number of correctly placed drains. Where a negative slope exists, consideration may be given to increasing the thickness of the insulation over the membrane to displace water. The drain body shall be recessed into the deck so that the clamping ring is flush with or below the deck surface. Sumps are recommended. The maximum slope that will be covered by Lightguard roof insulation systems is 2 inches per foot. The use of ASTM D 312-89, type Ill asphalt is preferred for all slopes. Lower melt asphalt can be used for low or no-slope applications.

Modified Bitumen Roof Installation Sweep the deck free of dust and debris. Prime the concrete surf ace with asphalt concrete primer (ASTM 041-78) at a rate of one gallon per square. Allow the primer to dry to the touch before continuing with the application of the modified bitumen membrane.

Hot Mopped Application For two or more plies: Starting at the low point of the roof, with a 1/2 width sheet as the first sheet and following with full sheets, fully mop one layer of fiberglass (ASTM D-4601) or modified bitumen base sheet perpendicular to the slope to the deck embedding it in ASTM D-312-89 type Ill asphalt, applied at the EVT of the asphalt and at a rate of 20-25 lbs. per square. Base


sheets shall be lapped 2" on all sides and 4" at the ends. The end laps should be staggered no less than 12" apart Mop the second sheet perpendicular to the slope, starting at the low point of the roof, as a full sheet. Fully mop the smooth surfaced modified bitumen sheets embedding them in ASTM D-312-89 type Ill asphalt, applied at the EVT of the asphalt at a rate of 20-25 lbs. per square. A flow of at least a 1/4" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". If additional modified bitumen plies are used, they must be installed in shingle fashion. For single ply: Fully mop the smooth surfaced modified bitumen sheets perpendicular to the slope embedding them in ASTM D-312-89 type Ill asphalt, applied at the EVT of the asphalt at a rate of 20-25 lbs. per square. A flow of at least a 1/4" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12".

Torched Application For two or more plies: Starting at the low point of the roof, with a 1/2 width sheet as the first sheet and following with full sheets, weld one layer of torchable modified bitumen base sheet to the deck starting at the low point and applying perpendicular to the slope. Base sheets shall be lapped 2" on all sides and 4" at the ends. The end laps should be staggered no less than 12" apart. Weld the second torchable smooth surf aced sheet perpendicular to the slope, starting at the low point of the roof, as a full sheet A flow of at least a 1/4" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". If additional modified bitumen plies are used, they must be installed in shingle fashion. For single ply: Weld the torchable smooth surfaced sheet perpendicular to the slope, starting at the low point of the roof, as a full sheet. A flow of about a 114" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12".

Adhered Application See approved manufacturer's specific instructions for installing peel-and-stick membranes.

Temporary Membrane It is not acceptable to include any temporary membrane as a part of a completed membrane. Install completed membrane in final

form on a day-to-day basis. If the slope of the deck is such that water might flow under the secured modified bitumen membrane, temporary water cut-offs are necessary at the end of the workday. Water cut-offs shall be removed prior to continuing the membrane application.

Flashing Installation T. Clear flashing specifications call out granule surfaced modified bitumen sheets adhered with ASTM D-312-89, type Ill asphalt or torch applied. All flashings must be completed in each area prior to installing Lightguard Ballasted Roof Insulation. Conform to details shown in architectural drawings, and install according to T. Clear flashing specifications. Non granule surfaced modified bitumen sheets may be used, but require additional periodic maintenance due to weathering. Maintenance is not included in the T. Clear warranty.


Fire Classification Information For Lightguard Roof Assemblies 1. All Lightguard assemblies are considered as ballasted systems with respect to Factory Mutual (F.M.). Refer to current F.M. data sheet 1-29. 2. All Lightguard roof assemblies are rated Class A. (fire from without). Obtain specific configuration details from Underwriter's Laboratory (U.L.) from the current roofing materials and Systems Directory. 3. For information on hourly rated constructions (fire from without), see the current U.L. Fire Resistance Directory.

[iC:I E~ CORPORATION

P.O. Box 416 Hamilton, Ohio 45012 1-800-544-7398

NOTICE: T. CLEAR CORP. bel~ves the information and recommendations herein to be accurate and reliable as of November 1990. However, since any assistance furnished by T. CLEAR CORP. with reference to the proper use and disposal of its products is provided without charge, and since use conditions and disposal are not within its control, T. CLEAR CORP. assumes no obligation or liabil ity for such assistance and does not guarantee results from use of such products or other information hereii; no warranty, expressed or implied, is given nor Is freedom from "'Y patent owned by T. CLEAR CORP. or others to be infe rred. Information herein concemilg laws and regulations is based on U. S. f~ral laws and regulations except where specific reference is made to those of other jurisdictions. Since use conditims and governmental regulations may differ from one location to another and may change with tine, It is the Buyer's responsiblrty to deterrile whether T. CLEAR CORP.'s products are appropriate for Buyer's use, and to assure Buyer's wor1<place and <foposal prac:tices are in ~"'nee with laws, ~ordinances, and other governmental enac:tments applicable ii the jurisdktion(s) havi1g authority over Buyer's operatiJns.

Cl 994 Clear CarporatiJn. UGHTGUARD" is a registered trademark of T. Clear CorporatiJn.

Modified Bitumen on Poured Gypsum concrete Deck General T. Clear approves smooth surfaced, reinforced APP or SBS Modified Bitumen (see materials listing) for a 2 ply membrane constructed with a mechanically attached fiberglass (ASTM D-4601) or modified bitumen base sheet. The mechanical fasteners will be those recommended for this type of deck, and in the pattern specified. Fully mop or torch modified bitumen sheet(s) to the base ply. Minimum thickness of this system shall be 160 mils not including the base sheet. This is covered with Lightguard® Ballasted Roof Insulation. All installations of the Lightguard system must be in accordance with current specifications approved by T. Clear, installed by a T. Clear approved contractor, and will be covered by a warranty from T. Clear. All membrane and flashing materials used on a roof shall be supplied by a single manufacturer.


Deck condition The erection and design properties for performance of the deck are not the responsibility of T. Clear and should be in accordance with applicable regulatory agency requirements and industry standards. Prior to the commencement of work, all roof surf aces shall be approved by the T. Clear applicator.

In particular the deck shall be smooth, well troweled, and have no pronounced ridges or depressions. It shall be dry and unfrozen at

the time of roofing. Provisions shall be made in the building design for the water-based material to dry to the underside.


Modified Bitumen Roof Installation Base Sheet Installation Sweep the deck free of dust and debris. Starting at the low point of the roof, with a 1/2 width sheet as the first sheet and following with full sheets, lay one ply of fiberglass base sheet (ASTM D-4601), or a modified bitumen sheet perpendicular to the slope lapping the side joints 2" and end joints 4''. Mechanically fasten along the laps at a maximum 9" intervals. Additional fasteners must be placed at the 1/3 points of the sheet in two rows which are staggered-fastened at 18" O.C. maximum. Fastener caps shall be a minimum of 2" in diameter. The end laps shall be staggered no less than 12" apart.


Hot Mopped Application Starting at the low point of the roof, mop the modified bitumen sheets to the base sheet. The smooth surfaced modified bitumen sheets are applied perpendicular to the slope, with ASTM D-312-89 type Ill asphalt, applied at the EV( of the asphalt and at a rate of 20-25 lbs. per square. A flow of at least a 1/ 4" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". Minimum thickness of this system shall be 160 mils not including the base sheet If additional modified bitumen plies are used to achieve the 160 mil thickness, they must be installed in shingle fashion.

Torched Application Starting at the low point of the roof, weld the torchable smooth surfaced modified bitumen sheets to the base sheet, perpendicular to the slope. A flow of at least a 1/ 4" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". Minimum thickness of this system shall be 160 mils not including the base sheet. If additional modified bitumen plies are used to achieve the 160 mil thickness, they must be installed in shingle fashion.


Flashing Installation T. Gear flashing specifications call out granule surfaced modified bitumen sheets adhered with ASTM D-312-89, type Ill asphalt or torch applied. All flashings must be completed in each area prior to installing Lightguard Ballasted Roof Insulation. Conform to details shown in architectural drawings, and install according to T. Clear flashing specifications. Non graoole surfaced rnocflfied bitumen sheets may be used, but require additional periodic maintenance due to weathering. Maintenance is not included in the T. Clear warranty.


Fire Classification Information For Lightguard Roof Assemblies 1. All Lightguard assemblies are considered as ballasted systems with respect to Factory Mutual (FM). Refer to current F.M. data sheet 1-29. 2. All Lightguard roof assemblies are rated Class A. (fire from without). Obtain specific configuration details from Underwriter's Laboratory (U.L) from the current roofing materials and Systems Directory. 3. For information on hourly rated constructions (fire from without), see the current U.L. Fire Resistance Directory.

l[] C::I E~ CORPORATION


1-800-544-7398

NOTICE: T. CLEAR CORP. bel~ves the information and recommendations her<in to be accurate and reliable as of November 1990. However, since any assistance furnished by T. CLEAR CORP. with reference to the proper use and disposal of its products is provided without charge, and since use conditions and disposal are not within its control, T. CLEAR CORP. assumes no obligation or liability for such assistance and does not guarantee results from use of such products or other information herein; no warranty, expressed or implied, is given nor is freedom from any patent owned by T. CLEAR CORP. or others to be inferred. Information herein concerning laws and regulations is based on U.S. federal laws and regulations except where specific refereoce is made to those of other jurisdictions. Since use condnions and governmental regulations may differ from one location to another and may change with time, it is the Buyer's responsibilny to determine whether T. CLEAR CORP.'s products are appropriate for Buyer's use, and to assure Buyer's wor1<place and disposal practices are in compliance with laws, r~tions, ordinances, and other governmental enactments applicable in the jsisdiction(s) having authority over Buyer's operations

01994 Clear Capor-iltion. l.IGHTQlARO" is a re9stEred tradernar1< of T. Clear Capor-iltion.

Modified Bitumen on Steel Deck General T. Clear approves smooth surfaced, reinforced APP or SBS Modified Bitumen (see materials listing) for a 2 ply membrane. It is constructed by mechanically attaching a fiberglass (ASTM D-4601) or modified bitumen base sheet through a minimum 1/2" Type X gypsum board, Densdeck or other T. Clear approved underlayment, to the metal deck. Attachment shall be in accordance with requirements of types and patterns of fasteners noted in either Factory Mutual Approval Guide (1-60 or 1-90 classification) or UL listing for system being installed. This is followed by modified bitumen sheet(s) mopped or torched to the base sheet. Minimum thickness of this system shall be 160 mils not including the base sheet. The completed membrane is covered with Lightguard® Ballasted Roof Insulation. All installations of the Lightguard system shall be in accordance with current specifications approved by T. Clear, installed by a T. Clear approved contractor, and will be covered by a warranty from T. Clear. All membrane and flashing materials used on a roof shall be supplied by a single manufacturer.



The deck shall be constructed per all latest Factory Mutual Engineering or Steel Deck Institute recommendations, including: 1) Deck gauge shall be no lighter than 22 gauge, 2) Side and end joints shall be adequately lapped and mechanically fastened or welded with all loose and broken welds repaired prior to roofing, and 3) Decking shall be adequately supported at all penetrations.


Other Rated Roof constructions As an alternate to minimum 1/2" Type X gypsum board, Factory Mutual Class 1 insulated steel deck roof construction is accomplished when the individual components of the roof system are as required by the Factory Mutual Approval Guide.

Modified Bitumen Roof Installation Attach a minimum 1/2" Type X gypsum board, Densdeck or other approved underlayment to the metal deck with a minimum of four fasteners per 4' x 8' sheet. The gypsum board or other underlayment shall be placed with edges parallel to the direction of the flutes and bear on the top surface. Sweep the deck free of dust and debris. Immediately install the mechanically attached base sheet.

Base Sheet Installation Starting at the low point of the roof, with a 1/2 width sheet as the first sheet and following with full sheets, lay one ply of fiberglass base sheet (ASTM D-4601), or a modified bitumen sheet perpendicular to the slope lapping the side joints 2" and end joints


4". Mechanically fasten into the steel deck along the laps at a maximum 9" intervals. Additional fasteners must be placed at the 1/3 points of the sheet in two rows which are staggered-fastened at 18" O.C.. maximum. Fastener caps must be a minimum of 2" in diameter. The end laps must be staggered no less than 12" apart.

Hot Mopped Application Starting at the low point of the roof, mop the modified bitumen sheets to the base sheet The smooth surfaced modified bitumen sheets are applied perpendicular to the slope, with ASTM D-312-89 type Ill asphalt, applied at the EVT of the asphalt and at a rate of 20-25 lbs. per square. A flow of at least a 1/ 4" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". Minimum thickness of this system shall be 160 mils not including the base sheet. If additional modified bitumen plies are used to achieve the 160 mil thickness, they must be installed in shingle fashion.

Torched Application Starting at the low point of the roof, weld the torchable smooth surfaced modified bitumen sheets to the base sheet, perpendicular to the slope. A flow of at least a 1I4" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". Minimum thickness of this system shall be 160 mils not including the base sheet. If additional modified bitumen plies are used to achieve the 160 mil thickness, they must be installed in shingle fashion.


Flashing Installation T. Clear flashing specifications call out granule surfaced modified bitumen sheets adhered with ASTM D-312-89, type Ill asphalt or torch applied. All flashings must be completed in each area prior to installing Lightguard Ballasted Roof Insulation. Conform to details shown in architectural drawings, and install according to T. Clear flashing specifications. Non granule surfaced modified bitumen sheets may be used, but require additional periodic maintenance due to weathering. Maintenance is not included in the T. Gear warranty.

Other Relevant T., Clear Specifications For installation of Lightguard Ballasted Roof Insulation panels, see:



Fire Classification Information For Lightguard Roof Assemblies 1. All Lightguard assemblies are considered as ballasted systems with respect to Factory Mutual (F.M.). Refer to current F.M. data sheet 1-29. 2. All Lightguard roof assemblies are rated Class A. (fire from without). Obtain specific configuration details from Underwriter's Laboratory (U.L) from the current roofing materials and Systems Directory.

3. For information on hourly rated constructions (fire from without), see the current U.L Fire Resistance Directory.

[jC:I E~ CORPORATION


1-800-544-7398

NOTICE: T. CLEAR CORP. bel~ves the information and recommendations herein to be accurate and reliable as of Nove11'1Jer 1990. However, since any assistance furnished by T. CLEAR CORP. with reference to the proper use and disposal of its prodocts is provided without charge, and since use conditions and disposal are not within its control, T. CLEAR CORP. assumes oo obligation or liability for soch assistance and does oot guarantee results from use of soch prodocts or other information herein; oo warranty, expressed or implied, is given oor is freedom from any patent owned by T. CLEAR CORP. or others to be inferred. Information herein concerning laws and regulations is based on U. S. federal laws and regulations except where specific reference ~ made to those of other jurisdictions. Since use conditions and govermiental re!J.liations may differ from one location to another and may change with time, It is the Buyer's responsibility to deterrrn whether T. CLEAR CORP.'s prodocts are appropriate for Buyer's use, and to assire Buyer's workplace and disposal practices are in ~iance with laws, regulations, ordinances, and other governmental enactments appticabte in the j.lisdiction(s) having authority over Buyer's operations.

01994 Clear Corporation. UGHTGIJARD" ~a re9stered trademarl< of T. Clear Corporation.

Modified Bitumen on Structural wood Fiber Deck General T. Clear approves smooth surfaced, reinforced APP or SBS Modified Bitumen (see materials listing) for a 2 ply membrane constructed with a mechanically attached fiberglass (ASTM D-4601) or modified bitumen base sheet. The mechanical fasteners will be those recommended for this type of deck, and in the pattern specified. Fully mop or torch modified bitumen sheet(s) to the base sheet. Minimum thickness of this system shall be 160 mils not including the base sheet. This is covered with Lightguard® Ballasted Roof Insulation. All installations of the Lightguard system must be in accordance with current specifications approved by T. Clear, installed by a T. Clear approved contractor, and will be covered by a warranty from T. Clear. All membrane and flashing materials used on a roof shall be supplied by a single manufacturer.



The structural wood fiber panels must be set level, aligned and carefully interlocked with all joints flush and even. Voids (gaps which are 1/8" or greater), thickness variations or projections which are 1/8" or greater between adjacent wood fiber panels shall be grouted and feathered smooth.

Deck Slope Requirements Roofs must be designed and constructed to drain water within 48 hours after a rain. A 1/ 4" per foot slope is recommended. The drain body must be recessed into the deck so that the clamping ring is flush with or below the deck surface. Sumps are recommended. The maximum slope that will be covered by Lightguard roof insulation systems is 2 inches per foot. The use of ASTM D 312-89, type Ill asphalt is preferred for all slopes. Lower melt asphalt can be used for low or no-slope applications.

Modified Bitumen Roof Installation Base Sheet Installation Sweep the deck free of dust and debris. Starting at the low point of the roof, with a 1/2 width sheet as the first sheet and following with full sheets, lay one ply of fiberglass base sheet (ASTM D-4601 ), or a modified bitumen sheet perpendicular to the slope lapping the side joints 2" and end joints 4". Mechanically fasten along the laps at a maximum 9" intervals. Additional fasteners must be placed at the 1/3 points of the sheet in two rows which are staggered-fastened at 18" O.C. maximum. Fastener caps must be a minimum of 2" in diameter. The end laps must be staggered no less than 12" apart.

Hot Mopped Application Starting at the low point of the roof, mop the modified bitumen sheets to the base sheet. The smooth surfaced modified bitumen sheets are applied perpendicular to the slope, embedded in ASTM D-312-89 type Ill asphalt, applied at the EVT of the asphalt and at


a rate of 20-25 lbs. per square. A flow of at least 1/ 4" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". Minimum thickness of this system shall be 160 mils not including the base sheet. If additional modified bitumen plies are used to achieve the 160 mil thickness, they must be installed in shingle fashion.

Torched Application Starting at the low point of the roof, weld the torchable smooth surfaced modified bitumen sheets to the base sheet, perpendicular to the slope. A flow of at least 1/ 4" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". Minimum thickness of this system shall be 160 mils not including the base sheet. If additional modified bitumen plies are used to achieve the 160 mil thickness, they must be installed in shingle fashion.

Temporary Membrane It is not acceptable to include any temporary membrane as a part of a completed membrane. Install completed membrane in final form on a day-to-day basis. If the slope of the deck is such that water might flow under the modified bitumen membrane, temporary water cut-offs are necessary at the end of the workday. Water cut-offs must be removed prior to continuing the membrane application.

Flashing Installation T. Clear flashing specifications call out granule surfaced modified bitumen sheets adhered with ASTM D-312-89, type Ill asphalt or torch applied. All flashings must be completed in each area prior to installing Lightguard Ballasted Roof Insulation. Conform to details shown in architectural drawings, and install according to T. Clear flashing specifications. Non granule surf aced modified bitumen sheets may be used, but require additional periodic maintenance due to weathering. Maintenance is not included in the T. Clear warranty.




Fire Classification Information For Lightguard Roof Assemblies 1. All Lightguard assemblies are considered as ballasted systems with respect to Factory Mutual (F.M.). Refer to current F.M. data sheet 1-29.


3. For information on hourly rated constructions (fire from without), see the current U.L. Fire Resistance Directory.

[jC:I E~ CORPORATION

P.O. Box416 Hamilton, Ohio 45012 1-800-544-7398

NOTICE: T. CLEAR CORP. believes the information and recommendatioos herein to be accurate and reliable as of November 1990. However, since any assistance furnished by T. CLEAR CORP. with reference to the proper use and disposal of its products is provided withoot charge, and since use cond~ions and disposal are not within its control, T. CLEAR CORP. assumes no obligation or liability for such assistance and does not guarantee results from use of such products or other information herein; no warranty, expressed or impl~d, is given oor is freedom from any patent owned by T. CLEAR CORP. or others to be inferred. Information herein concerning laws and regulations is based on U.S. federal laws and regulations except where specific reference is made to those of other jurisdktions. Since use conditioos and governmental regulations may differ from one location to another and may change w~h time, it is the Buyer's responsibility to determine whether T. CLEAR CORP.'s products are appropriate for Buyer's use, and to assure Buyer's workplace and disposal practices are in compliance with laws, regulatioos, ordinances, and other governmental enactments applicable in the jurisdictioo(s) having author~ over Buyer's operations.

©1994 Clear Corporation. LIGHT GUARD" is a registered trademark of T. Clear Corporation.

uGfrGuARD• Ballaste~ Roofing Systems

Modified Bitumen on wood & Plywood Deck General T. Clear approves smooth surfaced, reinforced APP or SBS Modified Bitumen (see materials listing) for a 2 ply membrane constructed with a mechanically attached fiberglass (ASTM D-4601) or modified bitumen base sheet. The mechanical fasteners will be those recommended for this type of deck, and in the pattern specified. Fully mop or torch modified bitumen sheet(s) to the base sheet. Minimum thickness of this system shall be 160 mils not including the base sheet. This is covered with Lightguard® Ballasted Roof Insulation. All installations of the Lightguard system must be in accordance with current specifications approved by T. Clear, installed by a T. Clear approved contractor, and will be covered by a warranty from T. Clear. All membrane and flashing materials used on a roof shall be supplied by a single manufacturer.

It is the contractors responsibility to operate in a safe manner. It is recommended that all roofing applicators attend a qualified educational program for torch applications such as those ottered by RIEi or SERTA.


The wood or plywood deck shall be properly attached to supporting members and shall be of sufficient thickness to prevent excessive deflection between supporting members. Wood roof decks shall be tongue and grooved, ship-lapped or splined to prevent differential flexing of the boards. Any significant voids shall be covered with sheet metal.


Modified Bitumen Roof Installation Base Sheet Installation Sweep the deck free of dust and debris. Cover the deck with a rosin or unsaturated sheathing paper weighing approximately 5 lbs. per 100 square feet when necessary. Lap each sheet a minimum of 2" and mechanically attach to deck sufficiently to hold in place. Sheathing paper may be omitted for plywood decks. Starting at the low point of the roof, with a 1/2 width sheet as the first sheet and following with full sheets, lay one ply of fiberglass base sheet (ASTM D-4601), or a modified bitumen sheet perpendicular to the slope lapping the side joints 2" and end joints 4". Mechanically fasten along the laps at a maximum 9" intervals. Additional fasteners must be placed at the 1/3 points of the sheet in two rows which are staggered-fastened at 18" O.C. maximum. Fastener caps shall be a minimum of 2" in diameter. The end laps shall be staggered no less than 12" apart.


Hot Mopped Application Starting at the low point of the roof, mop the modified bitumen sheets to the base sheet The smooth surfaced modified bitumen sheets are applied perpendicular to the slope, with ASTM D-312-89 type Ill asphalt, applied at the EVT of the asphalt and at a rate of 20-2 5 lbs. per square. A flow of at least a 114" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". Minimum thickness of this system shall be 160 mils not including the base sheet If additional modified bitumen plies are used to achieve the 160 mil thickness, they must be installed in shingle fashion.

Torched Application Starting at the low point of the roof, weld the torchable smooth surfaced modified bitumen sheets to the base sheet, perpendicular to the slope. A flow of at least a 114" shall be obtained around all seams. The sheet is installed with a minimum 3" side laps and 6" end laps. Offset end laps a minimum of 12". Minimum thickness of this system shall be 160 mils not including the base sheet If additional modified bitumen plies are used to achieve the 160 mil thickness, they must be installed in shingle fashion.


Flashing Installation T. Clear flashing specifications call out granule surfaced modified bitumen sheets adhered with ASTM D-312-89, type Ill asphalt or torch applied. All flashings must be completed in each area prior to installing Lightguard Ballasted Roof Insulation. Conform to details shown in architectural drawings, and install according to T. Clear flashing specifications. Non granule surfaced modified bitumen sheets may be used, but require additional periodic maintenance due to weathering. Maintenance is not included in the T. Clear warranty.


Fire Classification Information For Lightguard Roof Assemblies 1. All Lightguard assemblies are considered as ballasted systems with respect to Factory Mutual (F.M.). Refer to current F.M. data sheet 1-29. 2. All Lightguard roof assemblies are rated Class A. (fire from without). Obtain specific configuration details from Underwriter's Laboratory (U.l.) from the current roofing materials and Systems Directory. 3. For information on hourly rated constructions (fire from without), see the current U.L. Fire Resistance Directory.

lie:•--~ CORPORATION

P.O. Box416 Hamilton, Ohio 45012 1-800-544-7398

NOTICE: T. UEAR CORP. beieves the information and recorrmervlati>ns herein to be accurate and reiable as of November 1990. However, siu any assistance fimshed by T. CLEAR CORP. with reference to the proper use and disposal of its prodl>'.ts is provided wi1hwt charge, and silce use conditions and disposal are rat withil its cantrot, T. UEAR CORP. asstmeS oo obligation,.. liabllty lnr 5UCh assistn:e and does oot guarantee restits from use of 5UCh prodl>'.ts II' other information hereil; oo wiWri01!y, expmsed II' ~ied, is !,iven nor is freedom from any patent owned by T. UEAR CORP. II' others to be mrred. Hurmiltion hereil cooceming laws and regulati>ns is based oo U. S. federal laws and regulati>ns except where specific refereoce is made to those of other jurisdicti>ns. Since use corkilioos and govemmentaJ re!Pations may differ from ooe location to aoolher and may change with tine, tt is the Buyer's responsibility to determine whether T. CLEAR CORP.'s prcxb:ts are appropriate !or Buyer's use, and to ilSSU'e Buyer's wor1cplace and disposal practices are in compliance with laws, regulations, !l'dinances, and other yovenvnental enactments applicable in the jurisdictioo(s) having authority over Buyer's operations.

©1994 Clear Corporation. UGHTGUAROO Is a registered trademark of T. Clear Corporation.

Air Barrier Requirements

Loose laid and mechanically attached thermoplastic membranesrequire a substrate that qualifies as an air barrier. T. Clear TechnicalSheet #20 identifies the preparation required for each type of deckwhere an air barrier is required.

Dew Point Control

The optimum dew point location is in the extruded polystyrene abovethe waterproofing membrane. This optimum dew point location isachieved when all or most of the insulation is above the waterproofingmembrane. Preferred System design places less than 1/3 of theinsulation R-Value beneath the membrane. Adding insulation beneaththe membrane can lower the location of the dew point to below themembrane and adversely affect the performance of the roofing system.

Deck Condition

The erection and design properties for performance of the deck are notthe responsibility of T. Clear Corporation and should be in accordancewith applicable regulatory agency requirements and industry standards.Specific approved decks are listed along with minimal requirements.1. Poured Concrete Decks: Reinforced concrete decks shall have aminimum density of 150 lbs./cu. ft.. Structural lightweight concretedecks shall have a minimal density of 100 lbs./cu. ft.. The deck shallbe smooth and have no pronounced ridges or depressions. It must bedry and unfrozen at the time of roofing. T. Clear requires that onlyfully adhered systems be installed over monolithic concrete decks . Iftapered insulation is used to obtain slope in dead level applications, theinsulation must be adhered to the concrete deck. The insulation shallbe covered with a minimum 1/4" Dens-Deck Overlayment board, ora 1/2" gypsum board which is adhered to the insulation.2. Concrete Plank Decks: The deck units shall be tightly butted toadjacent units and shall be properly attached and aligned. All sidejoints between planks shall be key grouted to prevent differentialmovement and to compensate for misalignment ( max. 1/2").Camber differential between adjacent tees of more than 1/4" must becorrected before roofing by placing grout between adjacent memberson a slope of 1"/ft. feathered out to the lower tee. Grout installationshould be smooth without ridges or irregularities. The deck units shallbe directly welded to adjacent units. The deck surface must be dryand unfrozen at the time of roofing. Use of key grouting, or a 12" widemodified bitumen (mopped or torched over the side and end jointsbetween the deck units) may be used to provide an air barrier. Fully-adhered thermoplastic systems are acceptable for concrete plankdecks. If a loose-laid or mechanically attached thermoplastic system isspecified, a minimum 1/4" Microfoam, extruded polystyrene recoveryboard or equivalent is required between the deck and the membrane.3. Poured Gypsum Concrete Decks: The deck shall be smooth, welltroweled, and have no pronounced ridges or depressions. It must be

dry and unfrozen at the time of roofing. Provisions must be made inthe building design for the water-based material to dry to the underside.Loose-laid or mechanically attached thermoplastic systems require aminimum 1/4" Microfoam, extruded polystyrene recovery board, anon-woven polyester sheet, a non woven polypropylene sheet orequivalent between the deck and the membrane. 4. Lightweight Insulating Concrete Decks: The deck shall be smooth,well troweled, and have no pronounced ridges or depressions. It mustbe dry and unfrozen at the time of roofing. Provisions must be made inthe building design for the water-based material to dry to the underside.Loose-laid or mechanically attached thermoplastic systems require aminimum 1/4" Microfoam, extruded polystyrene recovery board, anon woven polyester or polypropylene sheet or equivalent betweenthe deck and the membrane.5. Steel Decks : The deck shall be constructed per current Steel DeckInstitute (SDI), including 1) deck gauge shall be no lighter than 22gauge, 2) side and end joints shall be adequately lapped, mechanicallyattached or welded with all loose and broken welds repaired prior toroofing, and 3) decking must be adequately supported at all penetrations.Gypsum board, Densdeck, extruded polystyrene, isocyanurate boardor other approved underlayment shall be attached to the metal deck inaccordance with required fasteners, types and patterns listed in T. Clear’sUL classification for 60 psf or 90 psf., a minimum of one fastener per4 square feet for 60 psf and a minimum of one fastener per 2 squarefeet for 90 psf. Thermo-plastic systems can be fully adhered to anappropriate overlayment on metal decks. 6. Wood Or Plywood Decks: The wood or plywood deck must beproperly attached to supporting members and must be of sufficientthickness (minimum 15/32 plywood) to prevent excessive deflectionbetween supporting members and to provide fire classification. Woodroof decks shall consist of well-seasoned lumber, edges of which shallbe tongue and grooved, ship-lapped or splined to prevent differentialflexing of the boards. Any significant voids shall be covered with sheetmetal that must be hemmed on all open edges a minimum 0.5" inorder to prevent damage to the membrane by sharp metal edges.Some thermoplastic systems can be fully adhered to wood or plywooddecks. If a loose-laid or mechanically attached thermoplastic system isspecified, a minimum 1/4 inch Microfoam, extruded polystyrenerecovery board, polyester or polypropylene slip sheet, or equivalent isrequired between the deck and the membrane. 7. Structural Wood Fiber Decks: The structural wood fiber plank shallbe set level, aligned and carefully interlocked with all joints flush andeven. Voids (gaps that are 1/8 inch or greater), or thicknessvariations and projections that are 1/8 inches or greater betweenadjacent wood fiber planks shall be grouted and feathered smooth.Some thermo-plastic systems can be fully adhered to structural woodfiber decks. 8. Existing Built-Up Roof Membranes: A built-up roof with a gravelsurface shall have the loose gravel removed by the use of a powerbroom. If the bitumen surface is less than 2 years old, a coal tar pitch

surface, or has been resurfaced within 2 years, then a slip sheet of 6mil polyethylene will be required. A loose-laid or mechanically attachedthermoplastic system is acceptable for existing BUR roofs. A minimum1/4 inch extruded polystyrene recovery board or equivalent is requiredbetween the old and new membrane. Contact the membrane supplieror review the membrane manufacturer’s data to achieve assurancethat the membrane is compatible with the existing roofing material.The recover specification by T. Clear Corporation must be followed forrecovering existing built-up roof systems.

Deck Slope Requirements

Roofs must be designed and constructed to drain water within 48 hoursafter a rain. A 1/4 inch per foot slope is recommended. “Dead level”decks using heat welded thermoplastic membranes are acceptablewith a sufficient number of correctly placed drains. Where a negativeslope exists, consideration may be given to increasing the thickness ofthe insulation over the membrane to displace the water, or appropriatetapered insulation can be added under the membrane to eliminate thenegative slope condition. The drain body must be recessed into thedeck so that the clamping ring is flush with or below the deck surface.Sumps are recommended. The maximum slope that will be covered byLightguard Ballasted Roof Insulation is 2 inches per foot.

Specification Requirements Common To All Thermoplastic Installations–Loose Laid, Mechanically Attached andFully Adhered

The following specifications provide the basis for the installation of thethermoplastic membrane systems, and are extended by thespecifications of the manufacturer supplying the materials for theinstallation. The materials for the installation of the membrane systemmust be purchased from a single membrane manufacturer.

1. Insulation Beneath The Membrane: It is preferable not to use moreinsulation below the membrane than required to protect themembrane from sharp objects or uneven substrates. However, wheninsulation is required for slope, tapered insulation such as extrudedpolystyrene is recommended. The addition of insulation under themembrane may change the dew point in the system. Care must begiven to the roofing system design in order to keep the dew pointabove the waterproofing membrane. The insulation must be securedwith compatible insulation adhesive to prevent movement. Slip sheetsmay be required between insulation and PVC based Thermoplasticmembranes. Consult membrane manufacturer or T. Clear forrequirements and use.

2. Seams: All approved thermoplastic membrane specifications mustuse heat welded seams in the field of the roof. All flashing details shalluse heat welded or solvent welded seams.

3. Placement: The membrane shall be loosely laid over the acceptablesubstrate (see Membrane Table #1). The membrane shall be allowedto relax a minimum 1/2 hour before final positioning and seaming.With respect to the fully adhered system, the membrane is partiallyremoved from the substrate so that adhesive can be applied to thesubstrate. Cuts for penetrations and projections should be carefullyexecuted. The membrane shall be unrolled and positioned with aminimum 3 inch overlap. Laps shall be shingled with the slope of theroof, so as not to develop buck water joints.4. Seaming: The sheets must be seamed using a proper heat welderdesignated by the membrane manufacturer. The seams shall be checkedfor continuity and integrity and repaired immediately.5. Termination And Securement: Positive membrane securementshall be provided at all membrane terminations. Termination barsshall be installed at the perimeter of each roof level, section, curbflashing, skylight, expansion joint, interior wall, penthouse, etc.Securement shall be provided at all angle changes. Mechanicalsecurement at terminations shall be sealed. Pull-out strengths ofthe securements shall be 100 lbs/lineal foot when tested by theprocedures described in the SPRI “Wind Design Guide For BallastedSingle Ply Roofing Systems”.6. Base Flashings: The longest pieces of flashing material availableshall be used to minimize splices. Precoated compatible metal flashingsshall be used wherever their installation is practical. Flashings shall notbe applied over thru-wall flashings or weep holes. When using thermo-plastic flashing material on a vertical surface, the seam between theflashing and the main roof sheet must be completed before bondingthe flashing to the vertical surface. Flashing membrane shall extend aminimum 6 inches onto the main roof sheet beyond the mechanicalsecurement. Care should be taken to ensure that the flashing does notbridge where there is a change of direction (e.g., parapet meets theroof deck). The top of the installed flashings shall be fastened undermetal counter flashing, coping cap, or metal reglet. The maximumdistance between fasteners shall be 8 inches O.C, applied through acontinuous bar to a solid substrate.7. Penetrations: All penetrations (pipes, supports, soil stacks, coldvents, etc.) passing through the roofing membrane shall be flashed.The flashing seal shall be made directly to the penetration passingthrough the roofing system. Precoated compatible metal flashings shallbe used wherever their installation is practical. When bonding directlyto metal, clean and prime the metal thoroughly. Apply bonding adhesiveto bonding surfaces. Allow to dry to touch, fold membrane materialonto the metal without wrinkling. Roll entire surface to fully mate thematerials. In addition to adhesive bonding mechanical clamps shall beused to secure the top of the prefabricated flashing to the penetration.Pipe clusters and unusual shape penetrations that cannot be sealedwith membrane or other prefabricated flashings shall be sealed bysurrounding them with pourable sealer in a new pitch pan. Pitch pansmust be maintained by the building owner. Water-shedding devicescovering pipe clusters are recommended.

8. Drains: Existing flashing, asphalt or other material shall beremoved providing a clean, smooth surface on all materials betweenthe clamping ring and the drain base in preparation for sealant andmembrane. Drain ring should be located at or below deck surface. Theuse of tapered insulation may be necessary to assure water draining.The seal between the membrane and the drain base shall be providedby sealant under constant, even compression from the drain ring.Cracked roof drain bowls and roof drains using lead -packing, oakum,or coal tar sealant, shall be replaced with new roof drains.9. Gravel Stops: The deck membrane shall be installed over theperimeter by properly securing it to a treated wood nailer on theoutside fascia of the building. The membrane shall extend below andbe sealed to the outside of the wood nailer using a termination bar andunder membrane sealant. Care must be taken to insure that an airbarrier is installed according to Technical Note #20 from T. ClearCorporation to prevent billowing of the membrane.10. Water Cut-Offs: Measures must be taken to ensure that waterdoes not flow beneath the completed sections of the new roofingsystem. Water cut-offs shall be provided on a daily basis and at theonset of inclement weather. Water cut-offs shall be removed beforethe resumption of work.

Attachment Of Membranes

Loose Laid: The membrane will not be attached in the field of the roof.The substrate, if any, between the membrane and the structural deckwill not be mechanically attached unless it is required to meet airbarrier requirements, as noted in T. Clear Tech Note #20.Mechanically Attached: The substrate for mechanically attachedmembranes must be attached to the deck using types of fasteners andpatterns to meet the minimum requirements identified in Factory Mutual’sApproval Guide for 1-60 or higher as required by the specification.The membrane shall be attached using plate, bar anchor, or batten inseam systems, as selected in the designer specifications for therequirements of 60 psf or greater, as specified. Through-membranepenetrating fastener systems, and plate-bonded systems are notapproved by T. Clear. Air barriers, as described in T. Clear Tech Note#20 must be included.Fully Adhered: Over the properly installed and/or preparedcompatible substrate, fresh, properly stored compatible adhesivedesigned for the membrane being installed shall be applied at therequired rate for the substrate in smooth, even coatings without voids,globs, puddles, or similar irregularities. The coated substrate shall beallowed to completely dry before positioning the membrane. Themembrane shall be unrolled and positioned with proper overlap,without stretching or stressing the membrane during placement. Oncein place, one half of the sheet shall be turned back and coated with

adhesive. When the adhesive has dried sufficiently to produce stringswhen touched with a dry finger, roll out the coated membrane ontothe previously coated substrate, avoiding wrinkles. The bonded half ofthe sheet shall be pressed down with a weighted foam-covered lawnroller. The remaining half of the sheet shall then be folded back,coated, and rolled using the same bonding procedure. Adjoining sheetsshall be installed in the same manner. Minimum overlap shall be 3inches. Laps shall be heat-welded and shingled so as not to developbuck water joints with respect to the slope of the roof.Adhered with hot steep asphalt (Felt Backed Membranes Only): Forpolyester felt backed thermoplastic materials, asphalt may be used asthe adhesive provided the substrate is compatible with the asphalt.Asphalt shall be evenly applied according to the membrane manufac-turer’s specifications. The membrane is unrolled onto the asphalt-coatedsurface within a time interval to permit the felt backing portion of themembrane to embed in the fluid asphalt coating. The succeeding rollsshall be applied in similar manner with the unbacked edge overlappingthe preceding roll, shingled with the slope of the roof. The sheet shallbe pressed down with a roller to ensure that the membrane isembedded in the asphalt.

Lightguard Installation

Slip sheets may be required between insulation and PVC based Thermo-plastic membranes. Consult membrane manufacturer or T. Clear forrequirements and use. To complete Lightguard PMRI systems, see:1. Lightguard installation, wind design, and securement specifications(LIDS 1995)2. Lightguard flashing details (LFD 1995)

Fire Classification Information

For Lightguard Roof Assemblies

1. All Lightguard assemblies are considered as ballasted systems withrespect to Factory Mutual. Refer to the current F.M. Data Sheet 1-29.2. All Lightguard roof assemblies are rated Class A (Fire FromWithout). See T. Clear current listings.3. For more information on the hourly rated constructions (Fire FromWithin), see the T. Clear current listings from the UL Directory.


1-800-544-7398

NOTICE: T. CLEAR CORP. believes the information and recommendations herein to be accurate and reliable as of December 1994. However, since any assistance furnished by T. CLEAR CORP. with reference to the proper use and disposal of its productsis provided without charge, and since use conditions and disposal are not within its control, T. CLEAR CORP. assumes no obligation or liability for such assistance and does not guarantee results from use of such products or other information herein; nowarranty, expressed or implied, is given nor is freedom from any patent owned by T. CLEAR CORP. or others to be inferred. Information herein concerning laws and regulations is based on U. S. federal laws and regulations except where specific referenceis made to those of other jurisdictions. Since use conditions and governmental regulations may differ from one location to another and may change with time, it is the Buyer’s responsibility to determine whether T. CLEAR CORP.’s products are appropriatefor Buyer’s use, and to assure Buyer’s workplace and disposal practices are in compliance with laws, regulations, ordinances, and other governmental enactments applicable in the jurisdiction(s) having authority over Buyer’s operations.

©1994 T. Clear Corporation. LIGHTGUARD® is a registered trademark of T. Clear Corporation.

SPECIFICATIONS

Thermoplastic Roofing Membranes

GeneralThermoplastic water-proofing membranes are acceptable for use withLightguard® Protected Membrane Roof Insulation (PMRI). Acceptablemembranes can be found in Table #1 above.The membrane shall be installed in accordance with one of thefollowing specifications:•The specifications of the membrane manufacturer and shallincorporate only those materials supplied by a single manufacturer.•The specifications developed by the specifier must have prior writtenapproval by T. Clear.•The T. Clear specifications incorporated in this document.These specifications can be extended with the application guidelinesfor Thermoplastic Membrane Systems by SPRI.

Warranty

All installations of the Lightguard PMRI systems must be in accordancewith current specifications approved by T. Clear, installed by acontractor approved by T. Clear and the membrane supplier,inspected by a T. Clear inspector, and will be covered by a warrantyfrom T. Clear.

The design criteria for the Lightguard PMRI system is to apply theroofing membrane directly to the substrate. The use of insulationbelow the membrane is acceptable, when it is specified, but insulationbelow the membrane is not warranted by T. Clear. AdditionalStyrofoam “R” Brand insulation, meeting ASTM C-578 type V, VI orVII, can be installed above the membrane and below the Lightguard.

Therm

oplastic Roofin

g Mem

branes 12/94

Table #1. Single-Ply MembranesManufacturer Designation Fully Mechanically Loose Not Recommended For

Adhered Attached Laid Monolithic Concrete Decks*

Bond Cote Systems Bond Cote 40 mil X X XBurke Industries Burkeline M358 MF** X X X

Burke Elvaloy X X XBurkeline M560 Vac Q** X X

Carlisle Syntec Hychoice** X X XDuro-Last Durolast 45 mil X X X

Durolast 50 mil X X XHyload Hyload 250 X XJPS Elastromerics Hi-Tuff** X X X

Hi-Tuff EP X X X Republic Powdered Metals Geoflex X XSarnafil G476 PVC X XSeal Dry SYS 3000, 5000, 7000 X X XSeaman Fibertite X X XTrocal SRB-50 or 60 X XTremco Tremco HP 4510** X X XVersico Versiweld X X X*Suitable for all other standard types of decks including Metal Decks, Panel Concrete, Wood Decks, Wood Fiber, Insulated Concrete and existing systems.**Technically a thermoset material, but acts as a thermoplastic during installation.


SPECIFICATIONSEPDM Roofing Membranes

GeneralEPDM water-proofing membrane material that meets therequirements of ASTM D 4637-87 is acceptable for use withLightguard® Protected Membrane Roof Insulation. Acceptabledeck / membrane assemblies can be found in Table #1 above.Membrane installations shall incorporate the current EPDMmanufacturer’s taped field seam and flashing specifications.The membrane shall be installed in accordance with one ofthe following specifications:

· The taped-seam specifications of the following Membrane Suppliers: Carlisle Syntec Systems, Celotex Corporation, Firestone Building Products Co., Genflex Roofing Systems, Manville Roofing Systems, Versico Inc.

· The specifications developed by the specifier with priorwritten approval by T. Clear.

· The T. Clear specifications incorporated in this document.

These specifications can be extended with the application guidelines for Thermoset Membrane Systems by the Single Ply Roofing Institute (SPRI).

WarrantyAll T. Clear Protected Membrane Roof systems installed usingLightguard Protected Membrane Roof Insulationshall be inaccordance with current specifications approved by T. Clear,installed by a T. Clear approved contractor, inspected by a T.Clear inspector, and will be covered by a warranty from T. Clear.The design criteria for the Lightguard system is to apply theroofing membrane directly to the substrate. The use ofinsulation below the membrane is acceptable, when it isspecified, but insulation below the membrane is notwarranted by T. Clear. Additional Styrofoam® Brandinsulation, meeting ASTM C-578 type V, VI or VII, can beinstalled above the membrane and below the Lightguard.

EPDM Roofing M

embranes See Table #1 5/97

See Table #1

Table #1. Approved Deck/Membrane Assemblies(See specifications for details)

EPDM Membrane AttachmentMechanically-Attached

Approved/S-TS-1-MANoNo

Approved/W-TS-1-MAApproved/F-TS-1-MAApproved/I-TS-1-MAApproved/E-TS-1-MA

Decks

Metal DeckMonolithic Concrete

Panel ConcreteWood DeckWood Fiber

Insulated Concrete Existing System

Fully-Adhered

Approved/S-TS-1-ADApproved/C-TS-1-ADApproved/P-TS-1-AD

NoApproved/F-TS-1-AD

NoNo

Loose-Laid

Approved/S-TS-1-LLNo

Approved/P-TC-1-LLApproved/W-TS-1-LLApproved/F-TS-1-LLApproved/I-TS-1-LLApproved/E-TS-1-LL

(T. Clear air barrier criteria must be incorporated)


SPECIFICATIONS

Note: All specifications use [ ] to indicate architects’ options.

LIGHTGUARD® SpecificationsInstall [2"] [3"] LIGHTGUARD insulation according to T. Clearspecification 4.3.2 and 4.3.3 over [approved membrane]. Allinstallations of the LIGHTGUARD Systems must be inaccordance with current specifications approved by T. Clear,installed by a T. Clear Approved Contractor and will be coveredby a warranty from T. Clear.

EPDM SpecificationsInstall [ mil] EPDM water-proofing membrane material thatmeets the requirements of ASTM D 4637-87. The EPDMmembrane shall be installed by experienced contractors that areapproved for installation of the membrane by Clear [and themembrane supplier]. EPDM membrane shall be installed inaccordance with the installation specification for taped seamedmembranes by [Carlisle Syntec Systems] [Celotex Corporation][Firestone Building Products] [Genflex Roofing Systems] [ManvilleRoofing Systems] [Versico, Inc.]; [The Architects Specification,approved by T. Clear]; [T. Clear].Attachment of Membrane[Options]

[Fully Adhered]EPDM taped seamed membrane shall be fully adhered to [{1/2"}{5/8"} Gypsum Board mechanically fastened over minimum 22ga. steel deck meeting the requirements of the Steel Deck Institute][Monolithic Concrete] [Concrete Panels] [Wood Fiber] followingspecifications for fully adhered systems.[Mechanically Attached]EPDM taped seamed membrane shall be mechanically fastened to[{minimum 22 ga.} Metal Deck] [Wood Deck] [Wood Fiber Deck][Insulating Concrete Deck] [Existing Roofing System] which has an

air barrier [minimum 6 mil polyethylene] [selected vapor barriermaterial] applied over the deck and beneath mechanicallyattached [Gypsum Board] [Fire Classified Insulation] The [GypsumBoard] [Insulation] shall be fastened using a minimum of one fastenerper two square feet. Installation of the air barrier shall be inaccordance with the requirements of T. Clear Technical Note #20. Themechanical attachment of the membrane shall be adequate to resist a[60] [90] psf uplift. Existing membranes and some other decks may notrequire additional air barrier. Determination of the adequacy of the airbarrier shall be made by the T. Clear Advisor/Inspector beforemembrane installation.[Loose Laid]EPDM taped seamed membrane shall be installed loose over[{minimum 22 ga.} Metal Deck] [Concrete Panels] [Wood Deck][Wood Fiber Deck] [Insulating Concrete Deck] [Existing RoofingSystem] which has an air barrier [minimum 6 mil polyethylene][selected vapor barrier material] applied over the deck andbeneath mechanically attached [Gypsum Board] [Fire ClassifiedInsulation]. The [Gypsum Board] [Insulation] shall be fastenedusing a minimum of one fastener per two square feet. Installationof the air barrier shall be in accordance with the requirements ofT. Clear Technical Note #20. Existing membranes, or keygrouted or sealed concrete panels and some other decks may notrequire additional air barrier. Determination of the adequacy ofthe air barrier shall be made by the T. Clear Advisor/Inspectorbefore membrane installation.

Short Form Specifications 7/96

7/96


1-800-544-7398

NOTICE: T. CLEAR CORP. believes the information and recommendations herein to be accurate and reliable as of November 1990. However, since any assistance furnished by T. CLEAR CORP. with reference to the proper use and disposal of its products is provided without charge, and since use conditions anddisposal are not within its control, T. CLEAR CORP. assumes no obligation or liability for such assistance and does not guarantee results from use of such products or other information herein; no warranty, expressed or implied, is given nor is freedom fromany patent owned by T. CLEAR CORP. or others to be inferred.Information herein concerning laws and regulations is based on U. S. federal laws and regulations except where specific reference is made to those of other jurisdictions. Since use conditions and governmental regulations may differ from one location to another and may change with time, it is the Buyer’s responsibility todetermine whether T. CLEAR CORP.’s products are appropriate for Buyer’s use, and to assure Buyer’s workplace and disposal practices are in compliance with laws, regulations, ordinances, and other governmental enactments applicable in the jurisdiction(s) having authority over Buyer’s operations.

©1996 Clear Corporation. LIGHTGUARD® is a registered trademark of T. Clear Corporation.

Short Form Specifications


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