McGrath Foundation Business Fundraiser Support
Waterseal is proud to support the McGrath Foundation as a Business Fundraiser, helping the foundation continue its work supporting people and families affected by cancer.
Commercial strength. Residential care.
Waterproofing Perth for Commercial, Civil & Residential Projects
Waterseal provides specialist waterproofing services across Perth and WA for commercial projects, civil works and residential properties. Choose the service area that best matches your project.
Technical & Structural
Commercial / Civil Waterproofing
For builders, developers, project managers, strata councils, facility managers, engineers and civil contractors needing leak diagnostics, investigation reports, remedial waterproofing, membrane testing and project-based waterproofing delivery.
Care-focused & Approachable
Residential Waterproofing
For homeowners, renovators and residential builders needing help with leaking showers, bathrooms, balconies, wet areas, rising damp, retaining walls, basements, pools and remedial waterproofing repairs. We find the source before we recommend the fix.
How We Work
How Waterseal Handles Waterproofing Projects
Every waterproofing project is different. Waterseal follows a practical process to understand the project type, assess the issue and recommend the right waterproofing approach.
Choose Your Service Area
Select Commercial / Civil Waterproofing or Residential Waterproofing so we can understand the type of support you need.
Tell Us About the Project
Send site details, photos, plans or a description of the waterproofing issue.
Inspection and Leak Diagnostics
Where the source is unclear, we investigate using non-destructive scanning and testing equipment and report our findings before any repair is recommended.
Waterproofing Recommendation
We recommend a suitable approach based on the area, substrate, exposure, drainage and risk.
Preparation and Application
The surface is prepared properly and the waterproofing system is applied with attention to joints, corners, edges and high-risk details.
Quality Check and Handover
Completed work is checked, tested where applicable and handed over with documentation and warranty details.
SPECIALIST CAPABILITIES
Heritage expertise and evidence-led consultancy.
FOR HERITAGE BUILDINGS
Heritage Buildings
Investigation and treatment of rising damp, salt attack and moisture-related deterioration in older masonry, plus controlled heritage surface cleaning.
FOR STRATA, BUILDERS & CONSULTANTS
Consultancy & Reporting
Independent investigation reports, opinion reports, repair scopes and specification review prepared for complex property and construction decisions.
Our Projects
Waterproofing Projects Across Perth & WA
Waterseal has delivered commercial, civil, heritage, remedial and residential waterproofing throughout Perth and Western Australia since 1996. Our project work includes roofs, podiums, car parks, plant rooms, lift pits, basements, retaining walls, rail infrastructure, heritage masonry, bathrooms, balconies and wet areas, together with leak diagnostics and investigation reporting.
Landsdale, WA
Private Residence – Landsdale
Waterseal remediated a masonry planter wall at a private residence in Landsdale by removing failed finishes, repairing and desalinating the brickwork, and applying a capillary densifier and cementitious waterproof parge coat.
- Client
- Location
- Private residential client
- Landsdale, WA
Roleystone, WA
Private Residence – Roleystone
Waterseal completed detailed wet-area waterproofing at a private residence in Roleystone using a multi-layer membrane system.
- Client
- Location
- Private residential client
- Roleystone, WA
Salter Point, WA
Private Residence – Salter Point
Waterseal treated lateral moisture entering through a soil-retaining masonry wall at a private residence in Salter Point.
- Client
- Location
- Private residential client
- Salter Point, WA
Perth, WA
5 Mill Street, Perth
Waterseal installed an approximately 800 m² single-ply TPO recovery membrane overlay to the retained roof at 5 Mill Street, Perth.
- Client
- Location
- Commercial property client
- Perth, WA
Why choose us
Why Choose Waterseal?
Waterseal has been diagnosing and solving water ingress in Perth since 1996. Commercial clients get technical capability, investigation reporting and accredited membrane systems. Homeowners get the same diagnostic rigour, explained in plain language, with a repair scope based on what was found rather than what was assumed.
Since 1996
Thirty years of waterproofing and leak diagnostics across Perth and regional WA.
Leak Diagnostics
Specialist scanning, thermal, acoustic and camera equipment to locate the source without destructive opening up.
Accredited Systems
Accredited Fosroc and GCP applicator and member of ACRA.
Investigation Reports
Written findings and repair scopes suitable for strata councils, builders, insurers and engineers.
Heritage Experience
Salt damp and rising damp investigation and treatment in older masonry buildings.
Consultancy
Independent waterproofing assessment, specification review and scope development.
Waterseal Capabilities
WATERSEAL IN ACTION
See Waterseal at Work Across Perth
A short look at the Waterseal crew, our preparation standards and the range of sites we work on across Perth.
Credentials You Can Verify
Accredited systems, recognised industry membership and proven delivery across residential, commercial and civil environments.
Accredited Fosroc Applicator
Accredited application capability for Fosroc waterproofing and remedial systems.
Accredited GCP Applicator
Accredited application capability for GCP waterproofing systems.
ACRA Member
Member of the Australasian Concrete Repair and Remedial Building Association.
Serving Perth Since 1996
Thirty years of waterproofing, diagnostics and remedial experience across WA.
50,000+ Installations
More than 50,000 compliant wet-area membrane installations completed.
What Clients Say
Selected 5-star Google reviews and long-term client feedback
Commercial Testimonial
Residential Testimonial
What Type of Waterproofing Do You Need?
Whether it is a leaking shower, a failed podium membrane or a civil structure, the first step is the same: find the source, then fix it properly. Select the pathway that matches your project, or contact us to discuss it directly.
Our story
Over 30 Years of Waterproofing Experience
Waterseal has worked in waterproofing since 1996, helping homeowners, builders and commercial clients investigate water ingress and complete reliable waterproofing work across Western Australia.
The Waterseal business story
Built on practical experience
Learn how Waterseal developed its technical capability, service approach and long-standing focus on solving waterproofing problems properly.
Since 1996
More than three decades in waterproofing
The 30-year video looks back at Waterseal’s experience and the work behind the business today.
Waterseal campaign
Waterseal with Tim Gossage
Tim Gossage joined Waterseal founder Leon de Gaye to share practical waterproofing advice, project experience and the Waterseal story.
231 Adelaide Terrace Project
Major WA Project Walkthrough and Highlights
A closer look at Waterseal’s investigation, coordination and delivery on a major Perth waterproofing project.
Community involvement
Supporting the WA Community
Waterseal supports causes and community activities that matter to people across Western Australia.
Fremantle Dockers Game Day Signage
Waterseal’s LED signage has appeared at Optus Stadium during Fremantle Dockers home games, placing the Waterseal name in front of WA supporters at the ground and watching on television.
Industry support
Australian Institute of Waterproofing
Waterseal supports the institute’s work to improve waterproofing knowledge, practice and standards across the industry.
Clients
Businesses and Builders We Have Worked With
Waterseal has delivered waterproofing and remedial work for builders, businesses, property teams and homeowners across Western Australia.
Educational content
Waterproofing Advice From Waterseal
Watch practical videos from Waterseal about preventing water leaks and making informed waterproofing decisions.