Description

Viking GM Torch On Membranes consist of three double layer membrane systems (Gemini APP, Lybra SBS and Phoenix Super APAO). The membrane products (both base and cap sheets) are manufactured from fibreglass/polyester composite reinforced modified bitumen.

Scope

1. Viking GM Torch On 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 respect to building height and maximum floor plan areas when subject to specific design; and,
• with building structures designed and constructed to meet the requirements of the NZBC; and,
• with substrates of plywood, concrete slab or Strandsarking® (roofs only); and,
• with minimum falls for plywood roofs of 1:30, concrete substrates of 1:60 and decks of 1:40; and,
• with decks that have a maximum area of 40 m2; and,
• situated in NZS 3604 Wind Zones up to, and including, Extra High.

2. Viking GM Torch On Membranes have also been appraised for use as roof and deck waterproofing membranes on specifically designed buildings within the following scope:

• subject to specific structural and weathertightness design; and,
• with substrates of plywood, concrete slab or Strandsarking® (roofs only); and,
• situated in specific design wind pressures (refer to Paragraph 8.1) and,
• with the weathertightness design of junctions for each specific structure being the responsibility of the building designer.

3. Roofs and decks waterproofed with Viking GM Torch On 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 decks; and,
• with the deck membrane continually protected from physical damage by a pedestal protection system or Viking Decoupling 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 membranes must be installed by Viking Roofspec licensed and trained installers.