Background

Most waterproof membrane systems are currently outside the scope of any of the Ministry of Business, Innovation and Employment's (MBIE, previously the Department of Building and Housing) Acceptable Solutions to the New Zealand Building Code, and can only be considered as an Alternative Solution for the purposes of any building consent application, with the exception of pre-formed rubber and EPDM membranes which are included within the Ministrys Acceptable Solutions.

As there are no Standards or accepted industry-wide documents in use in New Zealand, the WMAI are developing a suite of Codes for waterproofing membranes which will set the minimum WMAI-agreed benchmark requirements for an Alternative Solution. These Codes will also set recommended training criteria and installation methodology for the industry.