Description

Viking GM Torch-On Membrane Systems are a range of torch-applied reinforced modified-bitumen membranes for use as fully bonded double-layer torch on waterproofing membranes on nominally flat and pitched roofs.

Viking GM Torch-On Membrane Systems have been assessed as a roof waterproofing membrane system.

There are three Viking GM Torch-On Membrane Systems:

• Lybra SBS,
• Gemini APP and
• Phoenix Super APAO.

Scope

1. Viking GM Torch-On Membrane Systems are certified for use as a roof waterproofing membrane:

• a. on buildings:
  
  • within the scope limitations of NZS 3604:2011 and NZBC Acceptable Solution E2/AS1, Third Edition including amendment 10 (5/11/2020), Paragraph1.1; or,
  • within the scope limitations of NZBC Acceptable Solution E2/AS1, Third Edition including amendment 10 (5/11/2020), Paragraph 1.1 with regards to building height and floor plan area, when subject to specific structural design; and,
  • situated in NZS 3604:2011 Wind Zones, up to, and including Extra High, and
  • with substrates of plywood or suspended concrete slab, and
• b. on specifically designed or existing buildings:
  
  • subject to specific structural and weathertightness design situated in wind pressures up to a maximum design differential ultimate limit state (ULS) specified in #2 below; and,
• c. with substrates of plywood or suspended concrete slab, and
  
  • with a minimum fall of 1 in 30 (2 degrees) for roofs and 1 in 100 (0.5 degrees) for gutters, and
• d. where the membrane is on a trafficable area of a roof it must be continually protected from physical damage by pedestal protection system or other approved means.

2. Subject to the structural limitations of the substrate, Viking GM Torch-On Membrane Systems are certified for use up to a maximum design differential Ultimate Limit State wind pressure of 6.5kPa

3. Viking GM Torch-On Membrane Systems shall be:

• a. designed and installed in accordance with the requirements of the BRANZ Appraisal 948 (2017), amended 18 Sept 2019 and the Technical Literature “Viking_Roofspec_Torch-On Details_201123”, dated 23 November 2020, and
• b. Installed by a Viking Roofspec trained and licensed installer.

4. For existing buildings, the suitability of the roof shall be confirmed by a professional qualified to design buildings within the scope specified in Condition #1.

5. Product specification and incorporation of the Viking GM Torch-On Membrane Systems into the building design shall be carried out by a competent building professional, qualified to design buildings within the scope specified in Condition #1.

6. This certification does not include:

• a. details not covered by the Technical Literature, which shall be subject to specific weathertightness design, and
• b. the design and construction of the substrate including movement and control joints, and
• c. applications where ancillary components other than those provided by Viking Roofspec listed in the Technical Literature are substituted with alternative products, and
• d. integral roof gardens, steps within the roof surface and direct downpipe discharge to the roof level.