Description

Nova-SK, Novaflex and Polibit Roof and Deck Waterproofing Membranes are waterproofing membranes for nominally flat, pitched and curved roofs, gutters, parapets and decks.

The products are installed as double layer systems on roofs with mineral chip or paint finish, and on decks with a mineral chip finish and protected by a raised deck system. On concrete roofs and decks, the products are installed as a single layer system and protected by paving slabs or screed.

The products are supplied as torch-on or self adhesive, reinforced, polymer-modified bitumen sheets in roll form.

Scope

1. Nova-SK, Novaflex and Polibit Roof and Deck Waterproofing Membranes have been appraised as roof and deck waterproofing membranes on buildings within the following scope:

• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with respect to building height and maximum floor plan areas; and,
• with building structures designed and constructed to meet the requirements of the NZBC; and,
• with roof and deck supporting structures of timber framing with substrates of plywood or fibre cement sheet; and,
• with substrates of suspended concrete slabs; and,
• situated in NZS 3604 Wind Zones up to, and including, Extra High; and,
• with decks that have a maximum area of 40 m2 (refer to Paragraph 7.4).

2. Nova-SK, Novaflex and Polibit Roof and Deck Waterproofing Membranes have also been appraised for use as roof and deck waterproofing membranes on specifically designed buildings within the following scope:

• with building structures designed and constructed to comply with the NZBC; and,
• with roof and deck supporting structures of timber framing with substrates of plywood, cross laminated timber (CLT) or fibre cement sheet; and,
• with substrates of suspended concrete slab; and,
• subjected to maximum wind pressures (refer to Paragraph 8.1); 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. Roofs and decks waterproofed with Nova-SK, Novaflex and Polibit Roof and Deck Waterproofing Membranes must be designed and constructed in accordance with the following limitations:

• nominally flat, curved or pitched roofs, and decks constructed to drain water to gutters and drainage outlets complying with the NZBC; and,
• constructed to suitable falls (refer to Paragraphs 13.3 and 13.4); and,
• with no integral roof gardens; and,
• no steps in level within the deck area, except into gutters; and,
• no downpipes directly discharging to decks; and,
• with the membranes on decks protected from physical damage and ultraviolet (UV) light by ceramic or stone tile finishes or timber, resting on approved pedestal support system or Soprema Kraitec Step rubber tiles.

4. The design and construction of the substrate and movement and control joints is specific to each building, and therefore is the responsibility of the building designer and building contractor and is outside the scope of this Appraisal.

5. The membranes must be installed by Equus Industries Ltd licensed and trained installers.