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Welcome to the website of the Waterproof Membrane Association Inc (WMAI), recently renamed from the Membrane Group New Zealand Inc.

The WMAI is a group of companies in New Zealand who have an interest in membranes used for waterproofing applications. Membership includes manufacturers, importers and applicators, and is open to any interested party. The WMAI is NZ owned and operated.

Our purpose is to develop and promote a suite of Codes of Practice that cover the following types of membranes:

  • RMB (Reinforced Modified Bitumen)  formally known as Torch-on membrane 3rd edition published April 2019
  • Liquid-applied
  • Self-adhesive
  • Internal Wet Area Membranes 3rd edition published July 2018
  • Below Ground Tanking Membranes (Currently in production)

These publications are available for purchase on our publications page.

The suite of Codes will include the following applications for membranes:

  • Internal or external
  • Above or below ground
  • Roofing or decking
  • Trafficable or non-trafficable

We aim to set the benchmark for best industry practice in relation to waterproof membranes.

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