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ARDEX WeldTec Roofing System

The ARDEX WeldTec Roofing System is suitable in all climates and heat-weldable for quick, consistent installation and creates a secure continuous membrane.

  • Adhesive: ARDEX WA 98
  • Membrane: ARDEX WPM 715
Key Features
  • ARDEX WeldTec Membrane available in 1.5mm thickness
  • Black or Grey colour options
  • Excellent resistance to atmospheric agents, heat, sun, ozone
  • Excellent flexibility in low temperatures
  • Suitable in all climatic zones
  • Heat welded installation for fast, secure installation
  • Membrane can be re-blended and recycled
  • Excellent resistance to geothermal gases including hydrogen sulphide and methane
  • Suitable for foot traffic
  • Suitable for potable water collection
  • Manufactured in New Zealand
NZ Made
NZ Made
Recyclable Content (Post-Consumer)
Post-Consumer Recyclable Content
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
Limitations on Use
  • The membranes must be installed by trained applicators, approved by ARDEX New Zealand Limited
  • A Licensed Building Practitioner (LBP) is required to carry out Restricted Building Work. A LBP must do or supervise this work. They must work within the scope of their licence class.
  • 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
BRANZ Appraised
BRANZ Appraised
Product Info: ARDEX WA 98
Product Info: ARDEX WPM 715
BRANZ Appraisal: WPM 715


Installation Instructions: ARDEX WeldTec

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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