Bathroom Waterproofing
Sydney
Premium waterproofing membranes applied to AS 3740 standards — protecting your home for decades
Waterproofing — The Foundation of Every Great Bathroom
Waterproofing is the single most important step in any bathroom renovation. A failure here — whether from incorrect application, insufficient thickness, or missed penetrations — can result in water damage that costs tens of thousands of dollars to repair. It is also a mandatory requirement under the Building Code of Australia.
At Sydney Bathroom Renos, we treat waterproofing with the seriousness it deserves. We use premium liquid membrane systems, apply them at the correct thickness, flood test every shower, and issue a waterproofing certificate on completion. No shortcuts, ever.
Our Waterproofing Service
AS 3740 Compliant
All waterproofing is applied to Australian Standard AS 3740 — the mandatory standard for wet area waterproofing in residential buildings.
Premium Membranes
We use only premium-grade liquid membranes from leading manufacturers, applied at the correct thickness for long-lasting protection.
Full Wet Area Coverage
Shower floors, shower walls, bath surrounds, and full bathroom floors are waterproofed for maximum protection.
Certified Applicators
Our waterproofers are trained and certified in the application of the membrane systems we use, ensuring correct technique every time.
Correct Cure Times
We never rush the curing process. Full cure time is always observed before tiling begins, preventing premature membrane failure.
Waterproofing Certificate
A waterproofing certificate is issued on completion, documenting the membrane system used and confirming AS 3740 compliance.
Our Waterproofing Process
Surface Preparation
All surfaces are cleaned, primed, and any cracks or voids are filled to ensure a sound substrate for membrane adhesion.
Junction Sealing
All floor-to-wall junctions, pipe penetrations, and corners are reinforced with bond breaker tape and sealed.
First Coat
The first coat of liquid membrane is applied at the correct thickness and allowed to cure fully.
Second Coat
A second coat is applied perpendicular to the first, building up to the required total membrane thickness.
Flood Test
The shower floor is flood tested for a minimum of 24 hours to verify the membrane is watertight before tiling.
Certification
A waterproofing certificate is issued confirming AS 3740 compliance, ready for the tiling stage to begin.
Bathroom Waterproofing — Frequently Asked Questions
Protect Your Home with Expert Waterproofing
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