Description

ARDEX WPM 615 and WPM 612 TPO Membranes is a single ply, adhesive fixed, polyester weft reinforced, thermoplastic polyolefin (TPO) waterproofing sheet membrane for building roofs and decks.

Scope

ARDEX WPM 615 and WPM 612 TPO 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 regards to building height and floor plan area when subject to specific structural design; and,
• with substrates of plywood, Strandsarking (roofs only) or suspended concrete slab; and,
• with minimum falls for roofs of 1:30, plywood decks of 1:40 and suspended concrete slab of 1:60; and,
• with decks limited to 40 m²; and,
• situated in NZS 3604 Wind Zones up to and including Extra High.

ARDEX WPM 615 and WPM 612 TPO 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) or suspended concrete slab; and,
• situated in specific design wind pressures up to a maximum design differential ultimate limit state (ULS) of 3 kPa; and,
• with the weathertightness design of junctions for each specific structure being the responsibility of the building designer.

Roofs and decks waterproofed with ARDEX WPM 615 and WPM 612 TPO Membranes must be designed and constructed in accordance with the following limitations:

• nominally flat roofs and decks and pitched roofs 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 down pipe discharging directly onto the deck.
• with the deck membrane continually protected from physical damage by a pedestal protection system.

The design and construction of the substrate and movement and control joints is specific to each building, and therefore the responsibility of the building designer and building contractor and is outside the scope of theAppraisal.