The membrane is inspected while it is still a membrane and not a finished floor.
One of our inspectors will call you back.
If it is urgent, email [email protected]
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Building Dispute Practitioners Society Waterproofing failures are often the costliest defects in a new build. Dismantling the room to fix moisture issues after tiles are laid adds significant expense. What we have recorded in Whittlesea is membrane work left simply incomplete in a wet area, which is the version of this failure that is easiest to catch and cheapest to correct, provided somebody looks before the tiler starts.
Annotated findings from Waterproofing inspections.
1Bored piersAfter drilling and cage placement, before concrete
2Slab pre-pourThe day before pouring, before waterproofing
3FrameAfter wall frame erection and bracing, before lining
4Lock-up (pre-plaster)After roof cladding and external doors, before plasterboard
5FixingAfter joinery and doors installed, before painting
7Pre-handover (PCI)Two to three weeks prior to handover
21 October 2026 · 3 min read
A structural change that affects how the wall holds up above a door or window.
2 October 2026 · 3 min read
A timber pest report was written weeks after the framing stage, before the roof went on.
13 September 2026 · 3 min read
A moisture issue that is hidden until the weather changes.
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Check waterproofing in wet areas against the Domestic Building Contracts Act 1995, the Guide to Standards and Tolerances, and the approved drawings.
No. Waterproofing systems are tested in place by the contractor and this work is separate to a building inspection. Inspectors look at the site with their eyes and hands. This helps find work that is missing or finished poorly.
Timing between waterproofing and tiling often happens quickly. Schedule a pre-concrete pour inspection to inspect the waterproofer work before the concrete is laid.
You might notice wet skirting boards or discoloured walls a year after you settle in. This approach means tearing up tiles, the screed and starting the work over again.
It frequently is, and on most Whittlesea builds the two run as a single visit. We suggest booking a separate inspection before the tradespeople finish work.
The final inspection usually checks the coordination between the waterproofer and the tiler. The inspection details the site address and specific contract terms. This information allows builders to fix defects before floor coverings are laid.