TM GUIDE TO EXTERIOR INSULATION & FINISH SYSTEM …€¦ · Backer Rod. 3000 Corporate Center Dr. Morrow, GA 30260 800-294-3462. EIFS INDUSTRY MEMBERS ASSOCIATION

GUIDE TO EXTERIOR INSULATION & FINISH SYSTEMCONSTRUCTION

TM

EIFS INDUSTRYMEMBERS ASSOCIATION

Best Materials LLC distributes backer rod, caulking and sealants for all types of EIFS joints and penetration sealing applications.

Data Published Courtesy of EMIA Association.

Typical EIFS Configuration....................................................................

EPS Board Layout.................................................................................

Foundation Termination Options...........................................................

Sealant Configuration Options...............................................................

Window - Metal Framed, Exposed Sill Pan...........................................

Window - Nailing Fin, Concealed Sill Pan.............................................

Window - Brick Mold, Concealed Sill Pan.............................................

Plumbing and Electrical Penetrations....................................................

Sleeved Attachments.............................................................................

EIFS Termination at Properly Flashed Deck.........................................

Expansion Joints and Reveals..............................................................

Chimney Flashing..................................................................................

Soffit and Gable End.............................................................................

Dormer Flashing....................................................................................

Roof and Wall Intersection....................................................................

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

INDEX

GUIDE TO EXTERIOR INSULATION & FINISH SYSTEMCONSTRUCTION

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3000 Corporate Center Dr.Morrow, GA 30260800-294-3462

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GUIDE TO EIFS CONSTRUCTION

These drawings and comments are for general information only, and EIMA specifically disclaims any design or construction intent or responsibility. THERE ARE NO WARRANTIES, EXPRESS ORIMPLIED, ISSUED OR MADE BY EIMA IN CONNECTION WITH THESE DRAWINGS AND COMMENTS OR REGARDING THE USE OF EIFS. These drawings are not intended and should not beused as a substitute for the EIFS system manufacturer's specifications and recommended construction practices and/or for professional building design services. The specification, design and construction of all EIFS must comply with local building codes and standards, applicable compliance reports and the individual manufacturer's system requirements. Theserequirements differ materially. Only the EIFS manufacturer or design professional can furnish specifications, details, drawings, and construction practices to be followed for actual construction and use ofan EIFS product and for compliance with applicable local building codes and construction practices. The successful installation and performance of EIFS cladding is dependent upon the proper designand construction of the adjacent materials and systems of the structure. For these reasons, only a licensed and qualified design professional can create and issue specifications, drawings and details foractual or prospective construction or renovation using EIFS. These drawings and comments apply only to new construction beginning in 2000, and are not intended for inspections, retrofit or repair.These drawings are not intended as an exclusive method for achieving desired performance. Alternative configurations may achieve equal or better performance.These drawings and comments apply only to complete EIFS products as specifically defined in the current edition of EIMA Classification Paper.

1 Typical EIFS Configuration

Wood or Steel Framing

Substrate

Insulation Board

Fasteners

Reinforcing MeshEmbedded in Base Coat

Base Coat

Finish Coat

FIG 1STEEL OR WOOD FRAMING

EIFS may be attached by mechanicalfasteners (as shown) or by adhesive(as shown below).

FIG 2CONCRETE AND MASONRY

EIFS attached to concrete or masonryusing adhesive. Mechanical fastenersmay also be used.

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Concrete orMasonry Substrate

Adhesive Applied toInsulation Board

Insulation Board

Reinforcing Mesh Embedded in Base Coat

Base Coat

Finish Coat

© 2000 EIMA Issue 6/07

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513 West Broad Street Falls Church, VA 22046



2 EPS Board Layout

Insulation Board “L” Cut at Corners of WallPenetrations

Insulation Board Applied ina Running Bond Pattern

Interlock Edges ofInsulation Board atCorners

Starter Row of InsulationBoard Used to OffsetInsulation Board Jointsfrom Sheathing BoardJoints

FIG 1EPS BOARD LAYOUT

The Expanded Polystyrene Board (EPS)is placed on the wall in a running-bondpattern. The first row is generally halfwidth to minimize EPS board joints from lining up with sheathing joints. Todecrease base coat stress at corners ofwall openings, EPS boards are “L”cut.

FIG 2MESH TREATMENT AT FENESTRATION

To further guard against cracking, diagonal pieces of mesh called butterflies are placed over the wrapped mesh at corners of the opening.

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Encapsulate InsulationBoard Edge withReinforcing Mesh andBase Coat.

Strips of ReinforcingMesh Placed Diagonallyat Opening Corners

NOTE: Window flashings, not shown, are placed at the head and sill.


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3 Foundation Termination Options

Wrap Reinforcing Mesh

Terminate EIFS AboveGrade According to Local

Building Code

Finished Grade Slopedaway from Wall

FIG 1WRAPPING - Alternate 1

Fiber mesh located between substrateand insulation is attached either bybase coat, adhesive, or mechanicalanchorage.

FIG 2WRAPPING - Alternate 2

To give the foundation the appearance ofEIFS, the reinforced base coat and finishmay be lapped onto the foundation.

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EIFS Lamina Applied to Foundation

Terminate EIFS AboveGrade According to

Local Building Code

Finished Grade - Sloped Away from Wall


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4 Sealant Configuration Options

Quarter Round Backer Rod(Refer to Bond BreakerOptions Below)


Insulation Board

FIG 1FILLET JOINT

Fillet beads may be used for weather sealjoints such as at window and door perimeter.Note that sealant is applied to the reinforcedbase coat and not to the finish coat.

FIG 2BUTT JOINT

Expansion joints should be designed for a minimum of four times the anticipated movement, but not less than 3/4” (19 mm). For joints where movement has been determined to be negligible, the minimum butt joint size is 1/2” (13 mm). Note thatsealant is applied to the reinforced base coat and not to the finish coat.

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Sealant With ClosedCell Backer Rod

Reinforcing MeshEmbedded In Base Coat

Refer to the sealant manufacturer’s guidelines for specific installation requirements.

Insulation Board

Fillet Joint Bond Breaker Options

Bond BreakerTape

TriangularBacker Rod


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5 Window - Metal Framed, Exposed Sill Pan

Framing

Insulation BoardAdhesively orMechanically

Attached to Wall


FIG 1WINDOW HEAD

Even with the use of head flashing, sealant is still required, as indicated, and serves tocomplement the flashing in establishing awater tight, continuous weather seal betweenthe EIFS and the window frame.

FIG 2WINDOW SILL AND JAMB

The purpose of a sill pan flashing is to catchwater that may breach the window’s barrier orpass beyond the sealant. The flashing shouldextend between the framing members of therough opening and be sloped to allow water todrain to the outside of the EIFS. Also, sill panflashing end dams should extend 1/8" to 3/16"beyond outer plane of window frame. Exposedend dam edge may be covered with sealant ifdesired for improved appearance. To properlyfabricate this detail, the EIFS should beinstalled before the pan flashing is set inplace. this detail reflects an exposed sill pan.However, this type of window may also beinstalled with a concealed sill pan as depictedin figure 2 of drawings 6 and 7.

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Protective Wrap LappedInto Sill Flashing

Sealant With Closed CellBacker Rod Around Entire

Perimeter Of Window

Substrate


Head Flashing

Sealant With Bond Breaker

Window

Corrosion ResistantBlocking

Place Weeps InSealant at Sill Every

12” (305 mm)

Slope EIFS Below Sill

Sill Pan Flashing WithTurned Up Sides And

Water Tight Seams

Sealant

Refer to the window manufacturer’s guidelinesfor specific installation requirements.


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6 Window - Nailing Fin, Concealed Sill Pan

FIG 1WINDOW HEAD

Some finned windows are considered “self-flashed”. However, a careful examinationshould be made of the joinery between thehead, jamb and sill fins to ensure continuousprotection against air and water passage. Any breach in the window’s outer claddingshould be resolved with additional flashingand/or sealant. Consult the window manufacturerfor installation recommendations.


The purpose of a sill pan flashing is to catchwater that may breach the window’s barrier orpass beyond the sealant. The flashing shouldextend between the framing members of therough opening and be sloped to allow waterto drain to the outside of the EIFS. The spacermaterial should hold the nailing fin off of thesill pan extension by at least 1/8” (3mm) toform drainage channels.

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Refer to the window manufacturer’s guidelines for specific installation requirements.

Framing


Attached to Wall

Wrap ReinforcingMesh

Substrate

Reinforcing MeshEmbedded in

Base Coat

Window withNailing Fin

Sealant with BondBreaker

Nailing Fin

Sealant with Closed CellBacker Rod Typ. Around

Entire Perimeter of Window

Slope EIFS belowSill 6:12 Min.

Sill Pan Flashing WithTurned Up Sides, Sloped

For Positive Drainage



Spacer Material

Insulation Board BeneathSill Attached with

Mechanical Fasteners

Leave Gap Open

Sealant

Protective Wrap Lappedinto Sill Flashing


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7 Window - Brick Mold, Concealed Sill Pan

Framing

Insulation BoardAdhesively or Mechanically

Attached to Wall


FIG 1WINDOW HEAD

Even with the use of head flashing, sealant is still required, as indicated, and serves tocomplement the flashing in establishing awater tight, continuous weather seal betweenthe EIFS and the window frame.


The purpose of a sill pan flashing is to catchwater that may breach the window’s barrier orpass beyond the sealant. The flashing shouldextend between the framing members of therough opening and be sloped to allow water todrain to the outside of the EIFS. The drainagemedium should hold the EPS insulation boardoff of the sill pan extension by at least 1/8"(3mm). This detail depicts a concealed sillpan. However, this type of window may alsobe installed with an exposed sill pan as depicted in figure 2 of drawing 5.

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Sealant with Closed CellBacker Rod Typ. Around

Entire Perimeter ofWindow

Slope EIFS for Drainage

Sill Pan Flashing withTurned Up Sides and

Water Tight Seams

Substrate

Head Flashing


Sealant With Closed CellBacker Rod

Sealant



Drainage Medium

Insulation Board BeneathSill Attached with

Mechanical Fasteners

Sealant

Refer to the window manufacturer’s guidelines for specific installation requirements.

Window with Brick Mold

Leave Gap Open

Protective Wrap LappedInto Sill Flashing


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8 Plumbing and Electrical Penetrations

FIG 1HOSE BIBB ATTACHMENT

For accessories subjected to handling, such ashose bibs and railing supports, wood blockingoffers protection to the EIFS while providing abase for rigid attachment. The wood blockingmay be painted or encapsulated in flashing.

FIG 2ELECTRICAL ATTACHMENT

Electrical box installations, whether for lightfixtures or outlets, may be shimmed back tothe sheathing to allow for flush mounting ofthe electrical accessory.

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EIFS Finish Coat

Hose Bibb

Sealant with Closed CellBacker Rod

Decay and CorrosionResistant Blocking Painted

or Flashed for Protection

Insulation Board Adhesively orMechanically Attached to Wall

Substrate

Sealant in Fillet Configuration


EIFS Finish Coat

Fixture


Seal Fixture to Face of EIFS


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9 Sleeved Attachments

Substrate


Attached to Wall

Corrosion ResistantFastener and Sleeve Set in

Sealant Before InsertingFastener

FIG 1SHUTTER ATTACHMENT

Sleeve and fastener attachment is adequatefor most accessories. Downspouts, mailboxes, awnings, and other lightweightaccessories may be mounted using the procedure shown. For non-structural sheathing such as gypsum board, ensurefastener(s) is placed in framing or blockingto provide rigid attachment.

FIG 2WIRING PENETRATIONS

Phone lines, cable lines, outdoor speakerwire and the like may penetrate the EIFSwith the use of a sleeved grommet sized tofit snugly around the wire. The grommetflange provides an area for sealant application.

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Substrate


Attached to Wall

Sealant PlacedAround Sleeve

Reinforcing MeshEmbedded In Base Coat

Shutter

Corrosion ResistantSleeved Grommet

Sealant Placed AroundGrommet Flange


Cable

Finish Coat

1/4” (6 mm) Min.


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10 EIFS Termination at Properly Flashed Deck

FIG 1DECK SECTION

The EIF System is held off of deck surface to allow for installation and maintenance ofsealant, facilitate removal of foreign matterwhich may cause water retention, and todecrease exposure of wall system to precipitation, particularly snow and ice.

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Attached To Wall

Upper Flashing

Deck Board


Intermediate Flashing


Lower Flashing Set in aBed of Sealant

Header Joist

Finish Coat


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11 Expansion Joints and Reveals

Substrate

Gap in Sheathing


FIG 1FLOOR LINE EXPANSION JOINT

Expansion joints shall be installed in the EIFSystem as per manufacturers’ recommendationsbut as a minimum where changes in substrateoccur, where a joint exists in the substrate,and at floor lines in wood framed construction.

FIG 2AESTHETIC REVEALS

Reveals cut into the insulation board serve an aesthetic function by offering the look ofjoints without having to terminate the system.Grooves can also serve as a drip edge at soffits or head locations of fenestrations.

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Substrate


Attached to Wall

Finish Coat


Attached to Wall

For Recessed SealantJoints, Slope EIFS Surface

Outward to Drain



Finish Coat

Reveal

Reinforcing Mesh usedfor Detail Work Lapped

onto Wall Surface


3/4” (19 mm) Min.


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12 Chimney Flashing

FIG 1PROPER FLASHING

The flashing located on the high side of thechimney shall divert water away form the EIFSystem running down the side of the chimney.Turned out flashing ensures proper diversionof water.

FIG 2CHIMNEY WITH EIFS INSTALLED

With the EIF System terminating at the top ofthe turned out flashing leg and a fillet bead ofsealant applied to the flashing/EIFS interface,water is diverted around the chimney.

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Sheathing

Seal EIFS FlashingInterface

Flashing

Chimney Cap

Seal BetweenEIF System andChimney Cap

EIF System HeldOff Of Roof Line

Cricket Flashing

Diverter Flashing See Detail 15Flashing shall have watertight joints. Refer to the Sheet Metal and Air Conditioning Contractors NationalAssociation (SMACNA) for flashing configurations.

FIG 3EIFS CHIMNEY WITH CRICKET

Cricket detailing helps divert water aroundthe chimney and alleviates snow and icebuildup. Diverter flashing is used anywherean area of water shed terminates into a vertical wall.

Flashing Extending upChimney behind EIFS

Sealant

Sealant with ClosedCell Backer Rod

Seal Between EIFSystem and

Chimney Cap

Metal Flashing StepFlashed with Shingles

Flashing

EIF System Held off ofRoof Line


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13 Soffit and Gable End

FIG 1GABLE END

The frieze board should extend over the EIFSface approximately 1 1/2” (38 mm). For less ofan overlap it is advisable to terminate the EPSboard 1/2” (13 mm) from the wood blockingand apply sealant with closed cell backer rod.

FIG 3EIFS SOFFIT

As with all inside corners, the reinforcing mesh from both legs of thecorner should lap onto the adjacent leg 8” (200 mm). Under certain circumstances, an expansion joint may be required at the inside corner.Refer to the manufacturer’s specification for guidelines.

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WrapReinforcing

Mesh

Sealant


Attached to Wall

WrapReinforcing

Mesh

Reinforcing MeshEmbedded in

Base Coat


Attached to Wall

Sealant withClosed CellBacker Rod

FIG 2NON EIFS SOFFIT

Refer to the note for Figure 1.

Flashing

Frieze Board

Sealant

Wrap ReinforcingMesh


Attached to Wall


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14 Dormer Flashing

FIG 1FLASHINGS

Flashings should extend up wall. Where window is close to roof line, continue dormer-to-roof flashing into window opening.

FIG 2COMPLETED DORMER

The EIF system should be terminated abovethe roof line to facilitate roof repairs and treatment of EIFS termination. In addition, theclearance allows for free-flow of water andminimizes accumulation of debris. Sealantwith closed cell backer rod should be placedbetween the EIF system and gable and alsoaround window perimeter. For gable end withfrieze board see detail 13.

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Flashing shall have watertight joints. Refer to the SheetMetal and Air Conditioning Contractors NationalAssociation (SMACNA) for flashing configurations.

Dormer Shinglesover Valley Flashing

Flashing “StepFlashed” with

Shingles

Valley FlashingInstalled over

Shingles at Lower Termination

Dormer to Roof Flashing

Sealant with ClosedCell Backer Rod

Sealant withClosed CellBacker Rod

Terminate EIF System above Roof Line

Ridge Flashing


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t

t = thickness of insulation board plus 1"

110 min.

100

12" (305 mm)

6" (152 mm)

6" (152 mm)



15 Roof and Wall Intersection

Roof Shingles

Shingles “Step Flashed”with Roof Flashings

Watertight Diverter Seams

FIG 1FLASHING

Flashing should extend up behind EIF system.A diverter flashing should be used where evera water shed terminates into a vertical wall (as shown).

FIG 2EIFS INSTALLED

The EIF system should be terminated abovethe roof line to facilitate roof repairs and treatment of EIFS termination. In addition, the clearance allows for free-flow of water and minimizes accumulation of debris. Set the diverter flashing in a full bed of roofcement between the roof cement between the roof sheathing and underlayment.

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EIFS Terminated above Roof Line

Shingles “Step Flashed”with Roof Flashings

Substrate

Sealant with Bond Breaker

Seal Between Diverter and Drip Flashings

Drip Edge

Fascia

Flashing shall have watertight joints. Refer to the SheetMetal and Air Conditioning Contractors NationalAssociation (SMACNA) for flashing configurations.

t

t = thickness of insulation board plus 1"

110 min.

100

12" (305 mm)

6" (152 mm)

6" (152 mm)

Roof Shingles


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Tel 770-968-7945Toll Free 800-294-3462Fax 770-968-5818www.EIMA.com

3000 Corporate Center Dr.Suite 270 Morrow, GA 30260

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513 West Broad Street Tel 703-538-1616 Suite 210 Toll Free 800-294-3462 Falls Church, VA 22046-3257 Fax 703-538-1736 www.EIMA.com

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TM GUIDE TO EXTERIOR INSULATION & FINISH SYSTEM …€¦ · Backer Rod. 3000 Corporate Center Dr. Morrow, GA 30260 800-294-3462. EIFS INDUSTRY MEMBERS ASSOCIATION