Waterproof Sheet Membranes

Waterproofing under tiles is not something you can skip or cut short. The Surtec sheet membranes in this collection give you a solid barrier against moisture, keeping tiled bathrooms, balconies, and wet rooms protected for the long haul. Laid flat and joined correctly, the sheets form a continuous layer that moves with the structure and stops leaks from working their way through.

Tradies choose sheet membranes when the job calls for speed and reliability. They roll out cleanly, cover tricky junctions, and sit under tile or stone without bulking up the build. On-site, that means fewer callbacks for leaks and a system that keeps building inspectors happy. Whether it is a small ensuite, a commercial shower block, or an exposed balcony taking the weather, these membranes and accessories hold firm across a range of substrates common in New Zealand construction.