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WATERGATE PLUS

New Zealand’s premium all-purpose,

fire retardant wall wrap.

Watergate Plus is specifically designed as a wall underlay for use behind

exterior wall cladding. Made from synthetic materials Watergate Plus is fire

retardant, water resistant and vapour permeable. The water vapour transfer

rate of the product has been optimised to minimise condensation risk in

homes without compromising its primary water barrier properties.

Watergate Plus is part of the Thermakraft One Wrap System. Its unique

construction allows for easier installation while maintaining best in class

performance qualities.

Appraisal No.695 [2017]

INSTALLATION

GUIDE

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Application Method

• Fix Watergate Plus underlay with printed side facing the

exterior and run horizontally.

• Fix to all exterior walls from below bearers to the top

plate. Watergate Plus underlay is available in widths of

2740mm and 1370mm. The 2740mm width product is

generally wide enough to cover from below the bottom

plate to the top plate.

• Timber Framing: Pull the Watergate Plus underlay

tight and fix securely to the frame with fasteners such

as galvanized Little Grippers, 6mm-8mm staples or

20mm large head galvanized clouts at 300mm centres

horizontally and vertically.

• Steel Framing: Ensure frame is free from oil, dust and

dirt. Fix securely using construction grade double-sided

tape or adhesive or galvanized flat head screws that

are appropriate for external framing and roofing use, at

300mm centres.

Note: Check adhesive compatibility with Watergate Plus

and the steel framing materials before use.

If using a tape: Apply double-sided tape onto steel frame

studs and only peel off the forward-facing liner once

Watergate Plus is ready to be installed. When ready, peel

off approximately 2m of tape liner at a time and press

Watergate Plus firmly onto tape, ensuring it is taut.

Note: The double-sided tape is to temporarily hold the

Watergate Plus in place until the batten and/or cladding is

installed. The screws used to fix these are the permanent

fixings for Watergate Plus.

• Minimum of 150mm lap is required at joins. All vertical

laps must be made over studs. Horizontal laps to be laid

ship lap style allowing water to be shed to the outer face

of Watergate Plus.

• Cover all windows and door openings with Watergate

Plus underlay. It is recommended that the Watergate Plus

underlay is not cut and prepared for window installation

until the arrival of the windows.

• When windows and doors are ready for installation, the

Watergate Plus underlay covering the openings should

be cut at 45° and folded into the opening and securely

fastened. Thermakraft window flashing tapes are

recommended as the window flashing system.

Note: In accordance with NZBC Acceptable Solution E2/

AS1 and NASH Building Envelope Solutions: 2019 (E2/

AS4), wall underlay must be prevented from bulging into

the drained cavity. Where stud spacing is greater than

450mm, Thermakraft Stud Strap or Thermastrap run

horizontally at 300 centres is an acceptable means of

prevention.

• Once installed, Watergate Plus must not be left exposed

to the weather or UV for a maximum of 90 days.

Watergate Plus underlays will provide temporary weather

protection during construction allowing work to continue.

Internal linings and insulation must not be installed until

the exterior cladding is completed.

• Fastenings behind Brick Veneer Cladding must have an

equivalent service life to that of Brick Veneer (50 years).

Refer to NZBC B2 Durability.

• Repair small damaged areas with any Thermakraft

window flashing tape or Thermakraft Premium Joining

Tape. Any large areas which require repair may be

covered with a second layer of underlay with a lap of

150mm and then taping.

• Watergate Plus underlay must be installed by, or under

the guidance of a licensed building practitioner.

Fix Watergate Plus securely

to the frame.

On arrival of doors and windows, cut Watergate at each opening on a

45° angle away from each corner. Pull the Watergate flaps inside and

fasten to the inside of frame.

Application Tips

Watergate Plus is unaffected by LOSP or other solvent

based treated timber. However, LOSP or other solvent

based treated timber must have sufficient time for

the solvent to flash off in a well-ventilated area.

Recommended minimum 7 days.

25mm Thermakraft Stud Strap or Thermastrap

horizontally at 300mm centres if required

Wall framing shown

as dashed lines

Cavity battens 150mm overlap at stud

Watergate Plus

Premium Synthetic Wall Wrap