Structure First, Waterproofing Second
Approximate Balcony Waterproofing Cost Guide (Sydney 2026)
(Final cost always depends on size, access, condition & structure)
Demolition & Re-Build (If Structure Has Failed)
To receive a legal waterproofing certificate and full warranty, your project must be completed by:
Licensed Waterproofing = Full Legal Warranty
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(Simple & Proven)
✔ Then we design the correct waterproofing system for your specific structure.
✔ This stage controls 90% of future waterproofing success.
✔ Warranty issued for 6–10 years depending on system used
The owner contacted us after water leaked into the living room below their balcony during heavy rain. Previous repairs had failed twice. Our inspection found the balcony was built on yellow-tongue flooring with incorrect waterproofing.
We removed the failed system, rebuilt the surface with correct falls, installed a certified two-layer membrane, carried out a 24-hour flood test, and retiled the area.
Testing: We ran a water test to make sure the membrane had no leaks.
Report: Owners received photos of each layer + test results.
Report: Final photos and a completion update sent to the owners.
💡Cost Saving: Most leaks return because only the surface is patched. We inspect, diagnose, and repair the actual source so the problem doesn’t come back.
Cost Saving: Wrong membrane placement is the No.1 reason balconies fail. We follow the right layer order, test it, and document every step.
Don't skip the inspections once the surface looks “finished. ”We check each stage before moving on—so nothing gets buried or missed.
Our Preventive Approach:
We test and recommend non-slip, compliant tiles that meet Australian Standards (AS/NZS 4586).
Cost Saving: Minimises liability risk and avoids costly rectifications after safety audits.
Cost-Effective Solution
Recommended approach balancing quality and budget.
RISK-FREE RESEARCH: Your site inspection fee is fully CREDITED BACK to you when the project contract is signed.
In-depth site-investigation;
comparative quote for the defined scope.
Detailed Scope of Work
Alternative Solution: Suggestion for a viable alternative if applicable (e.g., phased repair vs. full replacement).
On-Site Session:
- Time Management Planning & Risk Mitigation
- Scheduling & Project Protection Review
Analysis of issues and clear, expert solutions.
Complex Assessment: Inspection of multiple units, common property, and complex strata defects.
Vertical Access Included:
Roofs and Balconies requiring ladder access (up to 7M/two stories).
Concealed Spaces: Comprehensive review of Basements, Sub-floors, and confined areas.
Separate Quote: Provides an independent, comparative quote for the defined scope.
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