A leaking balcony doesn’t just damage the surface. Water that reaches a crack in the concrete slab can start the rusting of the steel reinforcement inside. Once corrosion and spalling sets in, repair costs escalate significantly. The sooner it’s assessed, the more options you have.
WHAT WE FIX
Common Balcony Problems We Solve
Using thermal imaging, moisture mapping and visual inspection, along with targeted destructive investigation where necessary, we can identify likely water entry points and develop a tailored remediation plan.
HOW IT WORKS
Our Approach To Balcony Waterproofing
Every balcony leak is different. We take a diagnostic-first approach to understand what’s failed before recommending any repair method.
WHY CHOOSE WS REMEDIAL GROUP
What Sets Us Apart
We Are Remedial Building Specialists
Since 2009, we have been trusted by major builders, engineers, facility managers, strata managers, civil infrastructure project managers, government, hospitals, schools and homeowners to investigate and repair building defects.
For balcony leaks, that means finding where the water is getting in and what is causing it before recommending the repair.
Eligible work is backed by our 10-year workmanship warranty.
01
Fully licenced
QBCC Licence: 1162603 (Open Builder) and NSW Builder Licence 486689C. Solutions are compliant to all relevant Australian Standards and NCC. Our systems are certified to: ISO 9001:2015 Quality Management Systems | ISO 14001:2015 Environmental Management Systems | ISO 45001:2018 Occupational Health and Safety Management
02
Diagnostic-led approach
We investigate before we recommend. Moisture mapping, flood testing and thermal imaging identify the exact failure point so repairs address the cause and not just the symptom
03
Detailed reporting
On request, your project can be documented for you with a full photo report. Compliance reports for insurers and strata bodies are available on request.
04
Workmanship guarantee
We offer a 10-year workmanship warranty and up to 35 years manufacturer’s warranty on eligible projects. * Eligibility and conditions apply.
Owners And Strata Managers Trust Us
Thousands of balcony and waterproofing repairs completed across NSW, NT and QLD.
10,000+
Remedial repairs completed
10-YEAR
Workmanship warranty on eligible projects
Up to 35 YEARS
Manufacturer’s warranty on eligible projects
AU
Servicing Australia, with a strong presence in NSW, NT and QLD
“Our balcony had been leaking into the unit below for two seasons. WSRG found the failed membrane in an afternoon and had it sealed the next day. The ceiling repair quote we’d dreaded was no longer needed.”
Jackie H
Apartment owner, Parramatta NSW
“Worked with us to identify the best strategy and timeframe for our strata building. Mick kept us informed from start to finish and the 10-year warranty meant our insurers were satisfied immediately.”
Laura B
Northern Beaches strata manager, NSW
FAQ
Common Questions
What is remedial waterproofing?
Remedial waterproofing is the process of diagnosing and correcting failures in existing waterproofing systems. Unlike new-build waterproofing, it requires identifying why a system has failed before selecting the right repair method. Our team assesses the substrate, membrane condition and water entry points before recommending any works.
How do you find where the balcony is leaking?
Depending on the site, we use advanced diagnostic tools including moisture meters, flood testing and infrared thermal imaging to locate the source of water ingress. This approach can pinpoint membrane failure, grout fissures and slab cracks.
Will you have to remove all my tiles?
In most cases, yes. Where the waterproofing membrane has failed, or where the substrate has been damaged by sustained water exposure, a surface repair alone cannot resolve the problem.
Under the National Construction Code (NCC) and Australian Standard AS 4654, a compliant balcony system must be bonded directly to a sound substrate to protect against water ingress and structural damage. Surface-level patches are non-compliant and will fail prematurely.
To deliver a durable solution that honors mandatory structural warranties, the correct scope involves:
- Removing all tiles and the failed membrane.
- Assessing and rectifying the substrate for damage.
- Reapplying a new compliant waterproofing system.
- Correctly executing drainage, upturns, and movement joints.
- Re-tiling.
What membrane types do you use?
We apply and replace liquid-applied, sheet and torch-on membranes depending on the substrate, application area and the nature of the failure. All materials are selected to comply with relevant Australian Standards and the NCC.
What warranty do you provide?
We offer a 10-year workmanship warranty and up to 35 years manufacturer’s warranty on eligible projects. *Eligibility and conditions apply.
Do you provide reports for insurers or strata?
Yes. We provide a full photo report on completion of works upon request. Compliance and assessment reports for insurers and strata bodies are available on request.
What areas do you service?
We operate across Greater Sydney, Central Coast, Newcastle, Brisbane, Gold Coast, Sunshine Coast, and surrounding regions in NSW, and QLD, with national service capability. Call 1800 005 000 to confirm coverage for your suburb.
Certified to: ISO 9001:2015 | ISO 14001:2015 | ISO 45001:2018
