Viking Gemini APP is suited to tricky / confined roofs where it can be 'bled' in to vulnerable areas such as tight corners and awkward areas susceptible to leaks such as roof penetrations, internal corners and gutter junctions.

It is suitable for low-slope roofs (flat or curved), gutters and parapets, waterproofing beneath a floating deck, inland and coastal conditions, commercial and residential buildings.

Viking Gemini APP Waterproofing Membrane has been assessed as a roof waterproofing membrane on buildings within the following scope:

• The scope limitations of NZS 3604:2011 and 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,
• Situated in NZS 3604:2011 Wind Zones, up to and including Extra High; and,
• With substrates of plywood or suspended concrete slab; and,
• With a minimum fall for roofs of 1:30 (2 degrees)

Viking Gemini APP Waterproofing Membrane has also been assessed for use as a roof waterproofing membrane on buildings within the following scope:

• Subject to specific structural and weathertightness design situated in wind pressures up to a maximum design differential ultimate limit state (ULS) of 6 kPa: and,
• With substrates of plywood or suspended concrete slab

Viking Gemini APP (Atactic Polypropylene) is primarily designed to be installed in the Pacific Islands and NZ's Climate Zones 1 and 2 (North Island except for Central North Island Volcanic Plateau).

The system must be installed by a Viking Roofspec Trained and Approved Installer.

• Clause B1 STRUCTURE: Performance B1.3.1 and B1.3.4 (b) (c) (d) (e) for the relevant physical conditions of B1.3.3 (p). Viking GM Gemini A.P.P Waterproofing Membranes meet this requirement.
• Clause B2 DURABILITY: Performance B2.3.1 (b), 15 years. Viking GM Gemini A.P.P Waterproofing Membrane meet this requirement.
• Clause E2 EXTERNAL MOISTURE: Performance E2.3.1, E2.3.2 and E2.3.7 (b) and (c). Viking GM Gemini A.P.P Waterproofing Membrane meets these requirements.
• Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. Viking GM Gemini A.P.P Waterproofing Membrane meets this requirement and will not present a health hazard to people.

• BRANZ appraised (no. 948, 2017);
• Viking Gemini APP is backed by a 20-year product warranty and for specific projects, is eligible for Viking's Full System Warranty, which covers the product and installation in one document;
• The bitumen used in Viking Gemini APP is a bi-product of the oil refining process, providing a constructive use of this waste product;
• A Viking Gemini A.P.P roof can be overlaid at the end of its useful life, avoiding the dumping of the old roof and the filling of landfills with inorganic waste.