Membranes for wet areas
Looking for membranes for wet areas? Full AS 3740:2021 installation guide, NCC 2022 requirements, and common holds at the canonical article.
Ask Chalkline about this →The full guide for wet area membranes is at Wet area waterproofing membranes.
That article covers:
- AS 3740:2021 category and zone requirements (Category 1, 2, and 3)
- NCC 2022 Housing Provisions Part 10.2 compliance pathways
- Substrate preparation, bond breakers, and penetration sealing
- Coverage zones, upstand heights, and puddle flange installation
- Liquid-applied, sheet, and stainless steel membrane types
- Hold points, certifier inspection, and documentation
- Common failure modes: pinholes, unsealed penetrations, insufficient upstand, tiling before cure
Licensing requirement
All residential wet area waterproofing in Australia requires a licensed waterproofer. Licensing requirements vary by state: NSW requires a contractor licence for work over $5,000 in labour and materials (per NSW Fair Trading); Victoria requires a domestic builder (limited to waterproofing) registration with the VBA.
Go to the canonical article
See Wet area waterproofing membranes for the full procedure, tolerance tables, zone diagrams, and references. That article is the maintained version.