Waterproofing Membrane Repair and Installation
What it is
Under the tiles of every compliant wet area is a waterproofing membrane — a continuous barrier that stops water reaching the structure of the house. Australian Standard AS 3740 sets out where membranes are required and how they must be installed.
For new builds and renovations, we apply the membrane before tiling begins. For older homes, the job is usually the reverse: finding where an existing membrane has failed and repairing it, which typically means lifting tiles in the affected area and rebuilding the layers properly.
Why it’s worth doing
Failed waterproofing is the most expensive problem in this trade, because the damage happens out of sight. Rotting wall frames, damp downstairs ceilings, and lifting floorboards next to a bathroom all trace back to water getting past where the membrane should have stopped it.
Done once and done right, a membrane outlasts the tiles on top of it.
What to look for
Staining or bubbling paint on the far side of a shower wall, a musty smell that will not clear, swelling in a skirting board or door frame near a wet area, or a damp patch on a ceiling below an upstairs bathroom.
- Compliant with AS 3740 for wet areas
- New builds and renovations
- Leak investigation in existing bathrooms
- Repairs to failed membranes under tile