Leaks don't fix themselves.
Membrane failure is the most common defect in NSW Class 2 buildings — and the most expensive to ignore. We find the source, repair to specification, and prove it with a flood test before anything covers it.
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What is waterproofing remediation?
Waterproofing remediation is rebuilding the system that keeps water out of a building — balconies, planter boxes, rooftops, podiums, basements and wet areas. A membrane fails where it meets a detail: the door threshold, the drain, the upturn, the penetration. Water tracks back into the building from there, and the stain shows up somewhere else entirely.
Proper remediation locates the actual ingress path, strips back to a sound substrate, rebuilds the system from there — falls, detailing and a new membrane to standard — then proves it with a witnessed flood test before anything covers it. Because the work is over occupied space, it's staged so residents stay in place.
6 signs your waterproofing has failed.
Waterproofing fails quietly — the damage usually shows up away from the actual leak. These are the signs the system has let go.
A small leak is a 10× repair waiting to happen.
Membrane failure is the most common defect in NSW Class 2 buildings — and it never stays small. Caught late, a waterproofing job becomes a structural one.
10× repair escalation
A failed membrane caught early is a membrane replacement. Caught late, it's structural concrete repair, internal make-good and relocation costs.
Habitability liability
Ongoing ingress turns a maintenance item into mould, a health claim, and committee liability for a known, unactioned defect.
Asset value erosion
Water damage appears in strata reports and pre-purchase inspections — and follows the building until it's fixed properly.
Find the source. Prove the fix.
We don't coat over a failed membrane. We find where the water's actually getting in, rebuild the system, and flood-test it before anything covers it.
Find the actual ingress path
A waterproofing investigation — water testing, moisture diagnostics, forensic inspection — locates where the water is really getting in before a price is quoted. The stain is rarely above the leak.
Strip back and rebuild the system
We strip to a sound substrate, re-set the falls so water runs to the drain, and rebuild every detail — upturns, thresholds, drains and penetrations — before the new membrane goes down.
Lay a new membrane to standard
A new membrane to AS 4654.2 (or AS 3740 for internal wet areas), detailed at every junction — matched to whether it's a balcony, podium, planter, basement or bathroom.
Prove it with a witnessed flood test
The membrane is flood-tested and third-party verified before reinstatement — proven watertight before it's covered, then closed out like a defect rectification.
The types of waterproofing we do.
The full waterproofing discipline — each scoped on its own or as part of a building-wide program, staged so the space below keeps operating.
Why our waterproofing is proven, not hoped.
The cheap quote coats over the membrane and walks away. Here's what proving the fix means for your building.
The proof is in the projects.
Mixed-use strata — St Leonards
Non-compliant waterproofing to the rooftop and balconies replaced with a sheet membrane system, with all windows and doors renewed. Three scopes integrated into a single 8-month program to minimise disruption and duplication.
"They combined three major scopes into one program. We expected 12 months of chaos — it was done in eight."
— STRATA MANAGER, ST LEONARDS
Mid-Rise Strata — Warwick Farm
One residential tower with active roof leaks. Rooftop waterproofing had failed and water was getting into the units below every time it rained. We stripped the roof back to substrate, found the root-cause of failure at service penetrations and installed a new sheet membrane system with proper falls and drainage.
"They set up their team and completed the works all at once, not a single day of lost time was caused."
— STRATA MANAGER, WARWICK FARM
Low-rise strata — Manly
Tight walk-up strata with one driveway and carpark. Full balcony re-waterproofing delivered balcony-by-balcony while the property kept garage and driveway access. Staged for minimal disruption across the works.
"They worked around our access the whole time — every owner kept use of their carpark, and only a couple of balconies were ever offline."
— STRATA MANAGER, MANLY
Proven with a flood test. Verify everything.
Most waterproofing comes back because the last contractor coated over the problem and never tested it. We prove ours before it's covered.
From first call to fixed quote — source found first.
Send any reports, or just describe where the water's showing.
Within 24 hrsWe investigate and confirm the actual ingress path — not just where it shows.
Days, not weeksA documented, engineer-checkable scope your committee can approve.
Ready for AGMRebuilt, flood-tested and verified before reinstatement — residents in place.
On your scheduleWe're a fit for some buildings, not all.
We'd rather tell you upfront than waste your committee's time.
This is for you if…
- You manage or own a strata or commercial building with leaks or failed waterproofing.
- You want the source found and the system rebuilt — not the surface coated over.
- The building is occupied and works need to be staged around residents.
- You need a witnessed flood test and DBP-compliant documentation your insurer can rely on.
- Your project is from around $50K and up.
Probably not us if…
- You want a quick coating over the top with no investigation or testing.
- You're after the cheapest patch to get through the next inspection.
- It's a single small domestic wet-area job under a few thousand dollars.
- You need it done this week without an investigation — we find the source before we price.
You'll deal with the builder, not a call centre.
Waterproofing is the defect contractors love to coat over, because the membrane's hidden and the cover-up sells cheap — and it's back within a season. I won't do it. We find where the water's actually getting in, rebuild the system, and flood-test it before anything covers it. Send me your report and I'll tell you straight what it'll take to make it watertight for good.
What waterproofing remediation costs in Sydney.
These are realistic ranges — your fixed price is confirmed after a building investigation, before any work starts.
Targeted membrane replacement — a balcony, wet area or planter box.
Waterproofing across multiple elements or a podium and roof deck.
Building-wide waterproofing remediation programmes, residents in place.
Most projects run $80K–$900K, delivered with residents in place — and the scope is confirmed by investigation before any work starts.
Start with a conversation.
We'll visit your building, confirm the source of the leak, and give you a clear, fixed-price path forward — free, no obligation. We respond within 24 hours.
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What your committee will want to know.
Why does my leak keep coming back after repairs?+
What does a flood test prove?+
Where does waterproofing typically fail?+
What standards do you waterproof to?+
Can you work over an occupied building?+
What causes waterproofing to fail?+
How much does waterproofing remediation cost?+
Are you registered for regulated waterproofing work?+
How long does waterproofing remediation take?+
Do doors get removed during balcony waterproofing?+
What is the difference between a waterproofing repair and full membrane replacement?+
Is waterproofing regulated under the DBP Act?+
What warranty do you get on new waterproofing?+
Find the source. Prove the fix. Stop paying twice.
The ingress path found first, the system rebuilt to AS 4654.2, and a witnessed flood test before anything covers it. Book a free assessment or a 15-min call.