Waterproofing inspection in Tarneit

Stage6 of 7

When to bookAfter the waterproofer finishes, before the tiler starts

Time on siteAbout 1 hour on site

Inspected againstAS 3740 (waterproofing of domestic wet areas), AS 3958 (tiling), NCC Volume Two Part 10.2

What is included in a Tarneit waterproofing inspection

Membrane coverage across the floor and up the walls
Wall upturn heights at the shower and against hobs
Hob, threshold and step-down details
Bond breakers at wall and floor junctions
Floor waste flange bedded and sealed to the membrane
Falls to the floor waste and shower screed
Penetrations for taps, wastes and shower rails sealed
Membrane cure, damage and coverage before tiling
Primer and substrate preparation where visible
Set-down depth against the finished floor level
Junctions to baths, screens and vanities
Laundry, powder room and ensuite treated to the same standard

Why it matters here

Waterproofing inspections on Tarneit builds

Shower leaks are one of the most common warranty claims we see on Tarneit homes under five years old. Membranes that stop short of the required upturn, missing bond breakers at the hob, and floor waste flanges not sealed to the membrane are all invisible after tiling and expensive to rectify once the bathroom is finished.

What we find at this stage in Tarneit

Membrane upturn below the AS 3740 minimum at shower walls
No bond breaker at the hob and wall junction
Floor waste flange not sealed to the membrane
Falls to the waste not achieved in the screed
Membrane damaged or punctured before tiling

Waterproofing membrane damaged and needing repair before tiling starts, Tarneit — Waterproofing membrane damaged and needing repair before tiling starts

Broken roof tiles that will let water into the house, Tarneit — Broken roof tiles that will let water into the house

Sample findings

Sample defects found during our waterproofing inspections in Tarneit

Annotated findings from Waterproofing inspections on Tarneit builds. Client addresses withheld.

Shower screed damaged, so water cannot drain cleanly to the waste, found during a waterproofing inspection in Tarneit — Shower screed damaged, so water cannot drain cleanly to the waste

Waterproof membrane laid with no primer underneath, found during a waterproofing inspection in Tarneit — Waterproof membrane laid with no primer underneath

Lounge window set at the wrong height against the eaves, found during a waterproofing inspection in Tarneit — Lounge window set at the wrong height against the eaves

Bath hob junction not waterproofed the full 40mm each side, found during a waterproofing inspection in Tarneit — Bath hob junction not waterproofed the full 40mm each side

Membrane left unprotected and open to damage before tiling, found during a waterproofing inspection in Tarneit — Membrane left unprotected and open to damage before tiling

The other stages of a Tarneit build

All construction stage inspections in Tarneit →

Guides

Construction stage guides for Tarneit

5 August 2026 · 5 min read

When to book each stage inspection on a Tarneit build

Slab, frame, lock-up, fixing and PCI: the right moment to inspect each stage and what is lost if you miss it.

28 August 2026 · 5 min read

Frame inspection in Tarneit: what we check before the wrap goes on

Straightness, bracing, tie-downs, lintels and openings. The frame stage is the last time the structure is fully visible.

22 August 2026 · 5 min read

Lock-up and waterproofing inspections in Tarneit: before the plaster and tiles hide it

Flashings, wall wrap, brick ties and mortar joints at lock-up. Membranes, upturns and falls before tiling. Two checks that prevent most water problems.

All guides →

FAQ

Waterproofing inspections in Tarneit: common questions

What happens if the tiles are already on?

We test with a moisture meter and thermal camera and note what could not be verified. Membrane coverage can only be confirmed before tiling.

Do you flood test the shower?

Flood testing is a separate service. The waterproofing inspection is visual, with measurements of upturn heights and falls.

Is waterproofing part of the fixing inspection?

They used to be booked together, but the waterproofing window closes before fixing work finishes, so we inspect it as its own stage.