Description

Viking GM torch On Membrane Systems 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

Viking GM torch On Membranes have been appraised as roof waterproofing membranes on buildings within the following scope:

• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph1.1; 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 or concrete slab; and,
• with a minimum fall for roofs of 1:30 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.

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 or concrete slab; and,
• situated in specific design wind pressures (Refer Paragraph 8.1); and,
• with the weathertightness design of junctions for each specific structure being the responsibility of the building designer.

Roofs and decks waterproofed with Viking GM Torch On Membranes must be designed and constructed in accordance with the following limitations: 

• nominally flat of 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 downpipe direct discharge to the decks; and,
• with the deck membrane continually protected from physical damage by pedestal protection system or Viking Decoupling System.

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 constractor and is outside the scope of the Appraisal.

The membranes must be installed by Viking Roofspec Licensed and Trained Installers.