Description

ARDEX Torch Applied Membranes are waterproofing membranes for nominally flat and pitched roofs and decks.

They are installed as multi-layer systems with a mineral chip finished product or as a single-layer system onto a concrete substrate under heavy protection such as paving slabs or a topping screed.

Scope

1. ARDEX Torch Applied 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; or,
• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 with regard to building height and floor plan area when subject to specific structural design; and,
• with substrates of plywood, Strandsarking (roofs only), fibre cement compressed sheet or suspended concrete slab; and,
• with minimum falls for plywood and fibre cement compressed sheet roofs of 1:30, concrete roofs of 1:60 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. ARDEX Torch Applied Membranes have also been appraised as roof and deck waterproofing membranes on buildings within the following scope:

• subject to specific structural and weathertightness design; and,
• with substrates of plywood, Strandsarking (roofs only), fibre cement compressed sheet 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 ARDEX Torch Applied Membranes must be designed and constructed in accordance with the following limitations:

• nominally flat or pitched roofs and decks 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 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 is 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 trained installers, approved by ARDEX New Zealand Limited.