Description

Barrierbond WPM and Barrierbond Fast (2P) Exterior Membranes are liquid-applied waterproofing membranes for use under ceramic or stone tile finishes on external decks and balconies.

Scope

1. Barrierbond WPM and Barrierbond Fast (2P) Exterior Membranes have been appraised for use as waterproofing membranes for buildings within the following scope:

• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1; and,
• with timber supporting structures designed and constructed in accordance with the NZBC; and,
• with a substrate of fibre cement compressed sheet; and,
• with decks that have a maximum size of 40 m2; and,
• situated in all Wind Zones of NZS 3604 up to, and including, Extra High.

2. Barrierbond WPM and Barrierbond Fast (2P) Exterior Membranes have also been appraised for use as waterproofing membranes on specifically designed buildings within the following scope:

• with building structures subject to specific engineering design; and,
• with deck and balcony supporting structures of timber framing with a substrate of fibre cement compressed sheet; or,
• with a substrate of suspended concrete slab; and,
• subjected to maximum wind pressures (Refer Paragraph 7.8); and,
• with the weathertightness design of all junctions being the subject of specific design by the designer.

Note: The design of these junctions has not been appraised by BRANZ and is outside
the scope of this Appraisal.

3. This Appraisal is limited to decks and balconies within the following scope:

• constructed to suitable falls (Refer to Paragraphs 12.4-12.9); and,
• with the membranes continually protected from exposure to ultraviolet (UV) light and from physical damage by ceramic or stone tile finishes on a pedestal system; and,
• with decks and balconies designed and constructed such that deflections do not exceed 1/360th of the span; and,
• with no steps within the deck level, no integral roof gardens and no down pipes discharging directly onto the deck.

4. Building structural movement and control joints in the substrate must be carried through to the tile finish. The design and construction of the substrate and movement and control joints are specific to each building, and are therefore the responsibility of the building designer and building contractor and are outside the scope of this Appraisal.