Waterproofing Sydney
Licensed waterproofing Sydney — bathrooms, showers, balconies, wet areas & roofs. AS 3740 compliant with certificate. All Sydney suburbs.
Waterproofing failures are the single most expensive building defect in Sydney — causing concealed structural damage, black mould, delaminated tiles and collapsed ceilings that can cost tens of thousands to rectify. Tradie Heroes licensed waterproofers apply AS 3740-compliant membrane systems to bathrooms, shower recesses, balconies, laundries, roofs and any wet area — all backed with compliance certificates.
We apply waterproofing membranes across all Sydney property types including apartments in Parramatta and the CBD, terrace homes in the Inner West, beach houses on the Northern Beaches and large family homes in the Hills District. Our systems use commercial-grade polymer membranes that exceed Australian standards and carry manufacturer warranties of 10–20 years. Every job includes a compliance certificate to protect your insurance cover and property value.
What's Included
- Bathroom & shower recess waterproofing membrane
- Balcony & terrace waterproofing & drainage
- Laundry & wet area membrane application
- Roof membrane & re-sealing systems
- Pool surround & wet area waterproofing
- Remedial waterproofing for leaking balconies
- AS 3740 compliant — certificate of compliance issued
- Commercial-grade polymer membranes — 10–20 year warranty
Frequently Asked Questions
Is waterproofing required by law in Sydney?
Yes — AS/NZS 3740 requires waterproofing in all wet areas including bathrooms, showers, laundries and balconies. Failure to comply can void your home and strata insurance, and may cause issues when selling your property.
How long does waterproofing last in a Sydney bathroom?
Quality polymer membrane systems last 10–20 years when correctly installed. Cheaper acrylic paint systems may fail within 5 years. We use commercial-grade products that exceed AS 3740 minimum requirements.
Can you waterproof over existing tiles?
In some cases yes — where existing tiles are sound and the surface can be prepared. However, many insurers and strata managers require removal of existing tiles before applying a new membrane. We assess the existing surface and advise the best approach.
How long does waterproofing take to cure before tiling?
Curing time depends on the membrane system used, temperature and humidity. Typically 24–48 hours for the first coat, 24 hours between coats. We advise the tiler of the earliest date tiling can commence.
What is the waterproofing compliance certificate and why do I need it?
The certificate confirms that waterproofing was applied by a licensed contractor to AS 3740 standards. It's required by insurers, is part of the building approval documentation, and protects you if a waterproofing defect claim arises in the future.
Sydney Service Areas
We service all Sydney suburbs — call to confirm availability in your area.
Ready to get started?
Call us or book online — same-day assessment available across Sydney.