bearing timber. Profile locates positivelyeliminating misplacement possible with rollmaterial and provides positive vertical lappingwith DPM held within the side projections.

Application: TRADA Timber Frame Construction(5th) page 44 – 3.2.

DPC PROFILED THRESHOLD

GROUND BEARING CONCRETEFLOOR CONSTRUCTION / TIMBERDOOR SILL

USETo maintain DPCintegrity from sill tooversite DPM

SOLUTIONPreformed DPC profilecommences under sill and providesupward water check at back of sill. One pieceprofile provides positive watertight sill-backupstand not possible with roll DPC. Profileextends inwardly and dropsdownwardly to integrate withoversite DPM that is safelylapped under the descendingsection.

Application: TRADA Timber Frame Construction(5th) page 38 – 2.8.

USETo provide increased DPC protection ofdetails encountered in timber frameconstruction.

SOLUTIONUsing preformed profiles can permit builddetails to be more thoroughly protectedcompared with using roll materials. Protectioncan often extend three dimensionally,eliminating the requirement to bring togetherindividual statutory requirements on site. Ratherthan DPC protection being applied to just oneface, the preformed approach extends itfurther, guarding against dampness throughDPC misplacement or unintentional bridging.Some one-piece profiles additionally addresscontaminated land gas arrestment, and extendinwardly to the oversite membrane to provideunpunctuated linked integration

DPC STANDARD SOLE PLATEL SHAPED AND T SHAPEDPROTECTION

USETo provideconsistently shapedDPC under timberframe constructionsole plates andSIPS panels.

SOLUTIONL-shape protects plate horizontally andvertically against its inner face, as depicted inNHBC Standards 6.2. Also as shown in RobustDetails (6.11 to 6.15). Optional T-shape providesextended inboard projection for horizontalintegration with oversite membrane protection.

DPC PROFILED CAP INTERNAL TIMBERFLOOR

USETo provide DPC betweensole plate and internalload bearing supportwall, with adjacent slabfloor

SOLUTIONPreformed DPC profile caps the top of the loadbearing wall and extends downwardly on bothfaces.

Dampness in the masonry is isolated from thebearing timber. Profile locates positivelyeliminating misplacement possible with rollmaterial.

Application: TRADA Timber Frame Construction(5th) page 50 – 3.11, 3.12.

DPC PROFILED CAP INTERNAL SLAB DETAIL FLOOR

USETo provide DPC betweensole plate and internal loadbearing support wall

SOLUTIONPreformed DPC profile caps the top of the loadbearing wall and extends downwardly on both faces.Dampness in the masonry is isolated from the

26

Timber Frame and SIPS Preformed DPC Profiles

DAMP-PROOFING

STANDARD DIMENSIONS 110 x 110 x 2400 lengths

PACK SIZE 10 number

WEIGHT 9.5kg

BESPOKE OPTIONS Yes

STANDARD DIMENSIONS 12400 x 108 x 108mm & 2400 x 108 x 150mm

PACK SIZE 10 number

WEIGHT 5kg

BESPOKE OPTIONS Yes

STANDARD DIMENSIONS 110 x 110 x 2400 lengths

PACK SIZE 10 number

WEIGHT 9.5kg

BESPOKE OPTIONS Yes

STANDARD DIMENSIONS Bespoke to order

PACK SIZE Available individual

WEIGHT 15kg

PHONE 01935 474769 FAX 01935 428223 EMAIL enquiries@cavitytrays.co.uk

27

DAMP-PROOFING

DPC CAVITRAY STRAIGHTVENTILATOR BRIDGING PROTECTION

USETo provideprotection againstwater trackingacross to the insideskin via the top surface of a ventilator. Alsocranked ventilator applications.

SOLUTIONThe breather membrane is perforated by astraight sleeve and this occurs against the timberframe and usually immediately under the timbersole plate. Without a protective cavitray, watercan reach the perforated area. A preformed(sloping) cavitray wraps the sleeve so water isdirected away from the pierced skin. Considerapplications such as TRADA Timber FrameConstruction (5th) pages 36, 44, 45, 49 (3.9), 50(3.10).w

HOW TO ORDERProvide dimensioned profile or wall section andplans so optimum profile can be determined anda schedule submitted prepared.

SPECIFICATION WORDINGType …….. DPC Profile by Cavity Trays of YeovilSomerset BA22 8HU (01935 474769). Profile asagreed detail. Build in at appropriate levelobserving accompanying installation instructions.

DPC PROFILED SOLE PLATERENDER/TIMBER CLADDING

USETo provide DPCunder sole placeand

SOLUTIONPreformed DPC profile commences behind theinsulated timber skin and drops vertically andoutwardly providing DPC under the sole plate.On the outside face a turn-down lip provides adefined finish against which a ventilation grid asdepicted in TRADA Timber Frame Construction(5th) page 35 – 2.4 is located. For grid optionsconsider Type SV-GP, Type SV-FL, Type RASV andType Corbel.

BESPOKE OPTIONSYes

NEW WORK APPLICATIONSYes

RETROFIT APPLICATIONSSome

MASONRY SKIN STYLESNo known limitation

UNDULATING MASONRY FACESCompatible

CURVED WALL ON PLAN APPLICATIONSYes – see Curved Wall entries

CONGRUENT WITH OTHER WALL ELEMENTSNo identified incompatibility

ARRESTED WATER EVACUATIONVia Caviweeps (selection) in perp joints

THERMAL TRANSMISSION OF MATERIALNegligible

MATERIALPetheleyne DPC

COLOURBlack

EXTRUDES / COMPRESSES UNDER LOADNo

PACK SIZE / WEIGHTVaries pending design

CFCCFC Free

ODPZero

REGULATION COMPLIANCEYes

MAY BE USED IF CAVITY INSULATION PRESENT?Functionality not affected

CAD DOWNLOADSYes

STANDARD DIMENSIONS 1Lip 20mm.115 x 200 (125/75) x 2400 lengths

PACK SIZE 10 number

WEIGHT 15kg

BESPOKE OPTIONS Yes

STANDARD DIMENSIONS 330 x 160 x 50mm base

PACK SIZE Available individually

WEIGHT 0.5kg

BESPOKE OPTIONS Yes

SEE OTHER ENTRIES Sleeve & Duct Cavitrays

DPC profiles and fire-rated cavity stops (Type SAF & CFIS) ensure aconsistent build detail with timber frame and SIPS construction.

Timber Frame and SIPS Preformed DPC Profiles (continued)

PHONE 01935 474769 FAX 01935 428223 EMAIL enquiries@cavitytrays.co.uk