Product Description

Watergate Plus is a two-layer laminated wall underlay combining a Polyester non-woven layer with a high quality vapour permeable film. This allows water vapour to pass through from inside the wall cavity whilst water from the exterior is kept out.

The product is simply fixed to timber framing using construction staples and is made to stretch around corners providing a tight fit and reducing the risk of staple tear. It will provide temporary weather protection during construction. (Max 90 Days).

Scope of use

Watergate Plus can be used as a wall underlay on both residential and commercial buildings within the following scope:

• With absorbent wall claddings (e.g. timber, brick or fibre cement) or non-absorbent wall claddings (e.g. metal or plastic).
• Can be used with timber and steel framing, either directly fixed or in conjunction with an 18mm minimum drained cavity.
• With masonry veneer in accordance with NZBC Acceptable Solution E2/AS1 and E2/AS4.
• Situated in NZS3604 and NASH Building Wind Zones up to (and including) ‘Very High’ when used as a standalone flexible underlay, and “Extra High” when used as a flexible underlay over a rigid wall underlay.
• Is suitable as an air barrier in unlined wall spaces.
• Is suitable to be used in conjunction with thermal breaks on steel framed buildings.
• Refer to BRANZ Appraisal No 695 (2017) and CodeMark Certificate BRANZ-CM-1002 for full details.

General

• Fire retardant.
• 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.

Flammability Index

• Watergate Plus has been appraised with the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 and E2/AS4, with regards to building height and floor plan area.
• Watergate Plus has also been BRANZ appraised for use on buildings subject to specific weathertightness design. Building designers are responsible for the building design and for the incorporation of Watergate Plus into their design in accordance with the declared properties and the instructions of Thermakraft Ltd.

Durability

Meets the Performance Requirements of NZBC Clauses B2, Durability (B2.3.1 (a) 50 years, B2.3.1 (b) 15 years and B2.3.2), E2 External Moisture (E2.3.2), and F2 Hazardous Building Materials F2.3.1, providing:

• It is not damaged.
• Installed in accordance with instruction guide.
• Is not left exposed for more than 90 days.
• Installed by or under guidance of Licensed Building Practitioners.
• Is compatible with cladding system used.*

* Note: specifiers and product user must test for wall cladding system compatibility with the underlay before installation.