Description

The Viapol Systema Roof and Deck Membrane System is a double layer torch-on membrane system for roofs and decks.

The membrane products (both base and cap sheet) are manufactured from spun-bonded polyester-reinforced, modified bitumen.

Scope

1. The Viapol Systema Roof and Deck Membrane System has been appraised as a roof and deck waterproofing membrane system on buildings within the following scope:

• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1; or,
• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regards to building height and floor plan area when subject to specific structural design; and,
• with substrates of plywood or suspended concrete slab; and,
• with minimum falls for roofs of 1:30 and decks of 1:40; and,
• with deck size limited to 40 m2; and,
• situated in NZS 3604 Wind Zones up to, and including, Extra High.

2. The Viapol Systema Roof and Deck Membrane System has also been appraised as a roof and deck waterproofing membrane system on buildings within the following scope:

• subject to specific structural and weathertightness design and,
• with substrates of plywood or suspended concrete slab; and,
• situated in specific design wind pressures up to a maximum design differential ultimate limit state (ULS) of 6 kPa; and,
• with the weathertightness design of junctions for each specific structure being the responsibility of the building designer.

3. Roofs and decks waterproofed with the Viapol Systema Roof and Deck Membrane System must be designed and constructed in accordance with the following limitations:

• nominally flat roofs and decks and pitched roofs constructed to drain water to gutters and drainage outlets complying with the NZBC; and,
• with no steps within the deck level, no integral roof gardens and no downpipes directly discharging to the deck; and,
• with the deck membrane system continually protected from physical damage by a pedestal protection system.

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 membrane system must be installed by Sappi Italia NZ Ltd approved applicators.