Clyde Building
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Waterproofing failures in Clyde bathrooms and what they cost

Why membrane defects are the most expensive thing to find late.

Owner Inspections · Clyde 3978 · 2026-08-06

In short: A membrane defect found before tiling costs a morning. Found after, it costs the bathroom.

The membrane is the whole system

Everything else in a wet area is decoration. The membrane is what keeps water out of the frame.

Where it fails

Coverage short at wall junctions, bandage not integrated at corners, water stop angle finish inconsistent at the doorway.

Why timing decides cost

The membrane is covered by tile within days. After that, assessing it means removing the tiling.

What the standard says

AS 3740 covers waterproofing of domestic wet areas, alongside the NCC.

What we do not do

We do not flood test. That is intrusive and belongs to the waterproofer.

Written by the Owner Inspections team from inspections carried out in Clyde. Licensed building practitioners, Building & Plumbing Commission registration CDB-U 53425.

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FAQ

Questions Clyde owners ask about this

Can you inspect after tiling?

Only the visible result, not the membrane.

Is a leak always the membrane?

No. It can be the seal, the falls or the water stop.

Who fixes it?

The waterproofer, before tiling.

How long are you on site for a Clyde inspection?

Under an hour for a typical two bathroom home.

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