Balcony Waterproofing Sydney
Specialist balcony waterproofing and membrane systems for residential and strata buildings.
Overview
Balcony Waterproofing — Expert Solutions in Sydney
Balcony waterproofing failures are the leading cause of water damage claims in Sydney strata buildings. Our licensed waterproofers remove failed membranes, address substrate defects, and install high-performance liquid or sheet membrane systems that comply with AS 3740:2021. Every installation is backed by a written warranty and independent inspection.
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Why Choose Cornerstone
Benefits of Our Balcony Waterproofing Service
AS 3740:2021 fully compliant installations
Stops strata water damage disputes
10–15 year membrane warranties available
Thermal imaging leak detection included
Licensed waterproofer certification provided
Minimal disruption to residents
How We Work
Our Balcony Waterproofing Process
Every Cornerstone project follows a structured, quality-controlled process to deliver exceptional results.
Leak Investigation
Thermal imaging and water testing to identify all leak sources.
Strip & Prepare
All existing tiles, membranes and screed removed to expose structural slab.
Substrate Repair
Concrete defects and falls corrected before waterproofing commences.
Membrane Application
Liquid-applied or sheet membrane installed to AS 3740 requirements.
Flood Test
24-hour flood test conducted to verify membrane integrity.
Tiling & Finish
New tiles, drainage and flashings installed for full reinstatement.
Also Available
Related Services
Concrete Repair
Professional concrete repair for deteriorating structures across Sydney.
Crack Injection
Precision epoxy and polyurethane crack injection to seal structural and non-structural cracks.
Facade Restoration
Complete building facade restoration, render repair and protective coating systems.
Ready for Expert Balcony Waterproofing in Sydney?
Contact our specialists for a free site assessment and fixed-price quote. Limited project availability — enquire today.