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ARDEX WeldTec Warm Roof System

The ARDEX Warm Roofing System offers high energy efficiency with the Polyiso Insulation Board. This lightweight, easy-to-handle insulation is suited for direct application onto steel roof, concrete or wood deck. It provides outstanding thermal resistance, dimensional and compressive strength.

  • Vapour Barrier: ARDEX WPM 3000X
  • Insulation: ARDEX Polyiso Insulation Board
  • Adhesive: ARDEX WA 98
  • Membrane: ARDEX WPM 715
Key Features
  • Welded laps and seams for fast installation
  • Excellent resistance to ageing from heat, sunlight and ozone
  • Excellent resistance to atmosphere agents
  • Excellent resistance to geothermal gas including hydrogen sulphide and methane
  • Excellent flexibility at lower temperatures
  • Suitable for foot traffic
  • Suitable for potable water collection
  • No significant maintenance required
  • Available in black and grey
  • Manufactured in New Zealand
NZ Made
NZ Made
Scope of Use

As waterproofing membrane for roofs and decks within the following scope:

Site conditions:

  • All exposure zones excluding microclimates (para 4.2, NZS3604:2011), and
  • Up to 6.0kPa ULS pressure differential.

Buildings that meet the following:

  • For new buildings that comply with the structural requirements of the New Zealand Building Code, taking into account all applied loads specific to the building.
  • In existing buildings where the designer and installer have assured themselves that the existing building is suitable for intended building work
  • Where the substrate is as follows: plywood, concrete, ARDEX Polyiso board, or strandsarking
  • Green roofs or roofs where loose laid ballast has been applied
  • Decks and roofs may be of any slope or size provided that the designer has assured themselves that the structure and substrate have been designed to allow for all applied loads and that water will shed to avoid the risk of ponding

The ARDEX Polyiso is suitable for:

  • Adhered, ballasted and mechanically fastened single-ply roofing systems
  • Residential or commercial
Limitations on Use
  • Must be installed to the ARDEX technical literature
  • Must be installed by an ARDEX approved installer
  • Test welds must be completed at start of work
Statement of Building Code Compliance

If specified, installed and maintained in accordance with the conditions of this Product Technical Statement, the ARDEX WPM 715 WeldTec Membrane System will comply with or contribute to compliance with:

  • B1 Structure: B1.3.1, B1.3.2, taking into account B1.3.3 (a, b, c, e, f, j, q) 
  • B2 Durability: B2.3.1(b), B2.3.2(a)
  • E2 External Moisture: E2.3.1, E2.3.2
  • F2 Hazardous Building Materials: F2.3.1
  • G12 Potable Water: G12.3.2(c)
Other Performance Attributes


  • Test Report DC 3004-9 WPM 715 B
  • Test Report DC 3004-11 WPM 715 G

All tests applicable to AS 4654.1 including:

  • ASTM D6207 Dimensional stability
  • AS/NZS 4858 Heat Ageing 
  • CSIRO Moving joint test-Cyclic Movement
  • AS 4654.1 Table A4 Temperature resistance, tensile strength and durability
B1 Structure compliant
B2 Durability compliant
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
G12 Water Supplies compliant
Water Supplies
Data Sheet
Product Info: ARDEX WA 98
Product Info: ARDEX WPM 3000X
Product Info: ARDEX WPM 715
ARDEX WPM 3000X BRANZ Appraisal
ARDEX WPM 715 BRANZ Appraisal
Installation Instructions: ARDEX WeldTec
Product Info: ARDEX WPM 3000X
Product Info: ARDEX WPM 715

ARDEX New Zealand supply and manufacture a range of quality construction materials, including products for levelling floors; external and internal waterproofing; and fixing natural stone and tiles.

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