What causes window leaks
Most leaks are the result of more than one issue, which is why a methodical investigation is essential. Common factors include ageing or poorly-installed sealant, warped aluminium or timber frames, blocked weep holes, failed flashings, glazing gaskets that have shrunk over time and cracked glass that admits wind-driven rain. Building movement and extreme weather events can also force water through previously sound joints. Because these problems often sit behind architraves or within the façade system they remain hidden until visible damage appears. Our technicians understand the way windows are assembled across all major framing systems used in Australia, so we can trace moisture pathways with precision rather than guesswork.
Signs you may need leak detection
If you notice any of the following you should book a leak investigation before minor dampness becomes a major repair job
- Water stains or bubbling paint around the sill or jamb
- Musty odours near the window even when it has not rained recently
- Mould forming on internal reveals or carpet edges
- Condensation only on one section of the pane or frame
- Swollen skirting boards or floorboards below the opening
- Drips or pooling on the inside face during heavy rain
Early intervention limits disruption and reduces the likelihood of complete window replacement.
Our step-by-step detection process
- Site assessment -- We discuss the building history, recent weather patterns and any previous repairs with the owner or facility manager.
- Non-invasive inspection -- Using moisture meters and thermal imaging cameras we map hidden dampness without removing finishes.
- Targeted pressure testing -- If required we perform controlled water spray or negative pressure tests that replicate wind-driven rain to isolate the exact breach.
- Detailed reporting -- Findings are documented with annotated photographs so insurers, strata committees and builders can understand the root cause.
- Solution plan -- Because Express Glass delivers leak detection and glazing replacement, we can quote remedial works immediately or coordinate with your preferred contractor.
This structured approach removes guesswork, shortens repair timeframes and gives you a clear audit trail for compliance or insurance claims.
Advanced tools that save time and money
Our investment in industry-leading equipment means faster diagnostics and less invasive work. Thermal imaging highlights temperature differences created by evaporating moisture so we can follow the trail from the visible drip back to its origin. Digital borescopes let us inspect cavities behind cladding without large access holes. Portable pressure rigs simulate wind loads up to 600 Pa, exceeding the requirements of AS 2047, and our calibrated moisture meters record readings for each material encountered. By combining these tools with decades of glazing expertise we often find that the true entry point sits several metres from the visible damp patch, allowing targeted repairs instead of full façade removal.
Benefits of early detection
- Lower repair costs -- Addressing the leak before rot or corrosion sets in avoids extensive carpentry or structural steel work.
- Improved indoor air quality -- Eliminating dampness prevents mould growth that can trigger respiratory issues.
- Energy efficiency -- A dry, airtight window performs better at keeping heat in during winter and out during summer.
- Asset value protection -- Documented repairs reassure buyers, tenants and insurers that the property is well maintained.
- Regulatory compliance -- Timely action helps strata managers and facility owners meet their duty of care under WHS legislation.
Who we help
Express Glass serves a diverse client base across metropolitan and regional Australia.
- Residential owners rely on us to safeguard family homes from hidden water damage.
- Strata managers engage our rapid response crews to diagnose leaks between lots and common areas while minimising disruption to residents.
- Commercial property managers count on our national footprint for consistent service across office towers, retail centres and industrial estates.
- Builders and project managers value our ability to verify installation quality on new projects and provide remediation strategies that keep programmes on track.
Every job is backed by our 24/7 emergency hotline so you are never left dealing with a leak alone.
Commitment to safety and standards
All work is carried out under a rigorous WHS framework that includes site-specific Safe Work Method Statements, PPE compliance and regular training. Our leak detection procedures align with AS/NZS 4284 façade testing and AS 2047 window performance requirements. Express Glass is fully insured for public liability and professional indemnity, giving clients complete peace of mind.
Why choose Express Glass for leak detection
Experience counts. For more than four decades we have specialised in glazing solutions that stand up to Australia's harsh climate. Our technicians are not general-purpose plumbers or builders attempting to diagnose complex façade systems -- they are glazing specialists who understand the interplay between glass, frame, sealant and structure. We offer clear communication, transparent pricing and one point of contact from investigation through to final repair or replacement, saving you the hassle of coordinating multiple trades. When a leak threatens your property, choose the team with national reach, advanced technology and a proven track record of keeping buildings sealed and dry.
Ready to stop that leak?
Take the uncertainty out of water ingress. Contact Express Glass today to book a window leak detection inspection and receive a detailed action plan that protects your property and your budget.