Waterproofing check in Wollert

Stage6 of 7

When to bookAfter the waterproofer finishes and before a single tile is laid

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 Wollert 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 Wollert builds

Wet area leaks are the most expensive defect an owner in a new estate deals with, because rectification means removing tiling and screed in a finished house. Slab movement on reactive clay puts extra work into the junctions, so angle fillets, corners and hob details have to be right the first time.

What we find at this stage in Wollert

Membrane stopping short of the required height on shower walls and returns
No bond breaker or angle fillet at floor to wall junctions and internal corners
Thin or patchy coats with the substrate showing through at corners and edges
Primer skipped on a porous substrate, so the membrane will not bond properly
Bath hobs and step downs left uncoated, or the membrane not turned up a hob
Falls to the floor waste flat or reversed, leaving water ponding in the shower

External door to the garage not installed, which lock-up stage requires, Wollert — External door to the garage not installed, which lock-up stage requires

Gap around the meter box still to be caulked, Wollert — Gap around the meter box still to be caulked

Garage floor needing a clean before the final stage, Wollert — Garage floor needing a clean before the final stage

Sample findings

Sample defects found during our waterproofing inspections in Wollert

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

Bowed skirting boards noted in one or more rooms, found during a waterproofing inspection in Wollert — Bowed skirting boards noted in one or more rooms

Eave sections needing caulking or filling before painting, found during a waterproofing inspection in Wollert — Eave sections needing caulking or filling before painting

Balcony needing a clean before handover, found during a waterproofing inspection in Wollert — Balcony needing a clean before handover

Walls bowed or out of line by more than the allowed 5mm over a straight edge, found during a waterproofing inspection in Wollert — Walls bowed or out of line by more than the allowed 5mm over a straight edge

Cavity sliding door missing its guides, so the door rubs and scratches on the frame, found during a waterproofing inspection in Wollert — Cavity sliding door missing its guides, so the door rubs and scratches on the frame

The other stages of a Wollert build

All construction stage inspections in Wollert →

Guides

Construction stage guides for Wollert

6 March 2026 · 7 min read

When to book each stage inspection on a Wollert build

How to time the pre-slab, frame, lock-up, waterproofing and fixing inspections on a new Wollert home so faults are found while work is open.

21 March 2026 · 7 min read

Reactive clay and slab design on Wollert building sites

Wollert sits on Newer Volcanics basalt with heavy reactive clay above it. What that means for slab design and your pre-slab check.

4 April 2026 · 6 min read

If your Wollert builder refuses an independent inspector

What to do in Victoria when a builder blocks your private stage inspector, including contract access, written notice and the BPC dispute pathway.

All guides →

FAQ

Waterproofing inspections in Wollert: common questions

What standard covers wet area waterproofing?

AS 3740 covers waterproofing of domestic wet areas, called up by the NCC and the ABCB Housing Provisions. It sets where membranes are required, how high they go and how junctions and penetrations are treated.

Can waterproofing be inspected after tiling?

Not properly. Once tiles and screed are down the membrane cannot be seen at all, and a fault is generally only found when water appears elsewhere in the house. This stage has a very short window.

Will you flood test the shower?

No. We inspect visually and by hand, checking coverage, heights, fillets, primer and falls. Flood testing is carried out by the waterproofer or the builder, and we can report on the result they record.

Does the waterproofer give me a certificate?

In Victoria the waterproofer should supply documentation of the products used and the work done. Keep it with your build file. A certificate records what was claimed, not that the work matches AS 3740.

Are balconies and laundries included?

Yes, wherever a membrane has been applied and is accessible on the day. External balconies, laundries and powder rooms are all treated as wet areas and are checked the same way as bathrooms.

What happens if the membrane fails after handover?

Put it to your builder in writing first. If it is not resolved you can use the Building and Plumbing Commission's dispute resolution service, formerly DBDRV, and then VCAT's Building and Property List.