Are you keeping up with the latest NCC Requirements?

AS 3740:2021 is the Australian Standard that outlines the requirements for waterproofing internal wet areas in residential buildings, such as bathrooms, showers, laundries, and toilets. It provides guidance on how to properly design and install waterproofing systems to protect against water damage and moisture-related issues in homes. While not mandatory by itself, it is referenced in the National Construction Code (NCC), which means it is generally expected as part of best practice and compliance across Australia.

Under AS 3740:2021, key requirements include waterproofing shower walls to at least 1800mm high, using compatible waterproofing materials, ensuring correct installation at junctions and penetrations, and applying adequate falls in floors to direct water to a waste outlet. These measures help prevent leaks, protect structural elements, and support the longevity of internal wet areas in homes.

How the Wondercap Puddle Flange Kits Meet AS 3740:2021 Requirements

The Wondercap Puddle Flange Kits are specifically designed to support compliant waterproofing in wet areas as outlined in AS 3740:2021. Our kits create a secure, sealed connection between the waterproofing membrane and the plumbing system, helping to prevent water leaks around floor penetrations—one of the most common failure points in bathrooms and wet areas.

The flange provides a flat, stable surface for waterproofing application, ensuring membranes can be properly bonded and terminated at the drainage point. Combined with the Wondercap protective cap, the system also prevents debris from entering the waste during construction, reducing the risk of plumbing blockages or damage. By using Wondercap Kits, you’re supporting a best-practice approach to internal waterproofing and helping ensure compliance with NCC-referenced standards for residential builds and renovations.