“Design it once. Build it right.”
35% of waterproofing defects originate at the design stage, before anyone picks up a brush. Our design team of architects, engineers, and construction professionals reviews your waterproofing design to ensure compliance with the National Construction Code, Australian Standards (AS3740, AS4654.2), and material supplier specifications before works begin.
We work with architects, Tier 1 through Tier 3 builders, developers, and project managers to provide:
- Design compliance reviews — Drawings, sections, details, and specifications reviewed against NCC and relevant Australian Standards
- Performance solutions — Where deemed-to-satisfy provisions don’t clearly address the design, we develop performance-based solutions
- Basement waterproofing design — Bespoke approach based on site conditions, intended use, Council requirements, and Water Authority prescriptions
- Remedial design — For existing buildings with defects, we design the rectification scope, specify materials, and manage the remedial process
- Workshops and mark-ups — Collaborative sessions with design teams to resolve waterproofing details before they become site problems
- Declared designs (NSW) — Supporting regulatory compliance with documented waterproofing design declarations
Designs delivered
of defects are design-related
$0
The cost of fixing a defect that never happens
Our design team includes qualified architects, civil engineers, and construction managers. We review everything from internal wet areas to rooftop podiums to basement tanking systems.
Inspections completed
Hundreds
of projects inspected for tier-1 builders
Independent
of all installers and manufacturers
We have inspected for Lendlease, BESIX Watpac, CPB Contractors, Toga, Growthbuilt, Built, Richard Crookes, and Meriton, among hundreds of others.
“See what others miss.”
Waterproofing is not as simple as applying a coating. Australian Standards, the NCC, and Housing Provisions outline minimum requirements for membrane installations, but compliance depends on correct falls, terminations, detailing, thickness, and substrate preparation. Our inspectors are educated in what is required and assess compliance at every critical stage.
We provide independent on-site inspections during construction to verify:
- Application continuity — Ensuring the membrane is applied without gaps, voids, or discontinuities
- Thickness compliance — Verifying dry film thickness meets manufacturer specifications and Australian Standards
- Falls and terminations — Checking that the membrane sheds water correctly and terminates at the right height and detail
- Substrate preparation — Confirming the surface is clean, primed, and suitable before membrane application
- Compliance with NCC and AS3740 / AS4654.2 — Independent verification that the installation meets regulatory requirements
- Material and product compliance — Ensuring the installed system matches the specified and approved products
Our inspections are independent of all installers and manufacturers. We have no commercial relationship with any waterproofing contractor or product supplier.
“Trust the data, not the promise.”
Waterproofing Integrity is NATA accredited (Accreditation No. 21463) for waterproofing testing services. Our technicians use state-of-the-art diagnostic equipment to provide quantitative, evidence-based reports on the integrity of waterproofing systems in new construction, maintenance programs, and diagnostic investigations.
We don’t guess. We measure.
Testing Methodologies
Electronic Leak Detection — Holiday Testing (Dry, High Voltage)
A non-destructive test using a high voltage DC holiday detector on exposed membranes. Detects pinholes, voids, and discontinuities not visible to the eye. More time-efficient than flood testing and works on vertical surfaces including shower walls and retaining walls. This is the most commonly used method on WI projects.
Electronic Leak Detection — Wet / Vector Mapping (Low Voltage)
A low voltage method that uses water to complete an electrical circuit through membrane breaches. Suitable for existing buildings where membranes are covered. Works over tiles on balconies, podiums, and rooftops. The preferred method for diagnostic applications in commercial buildings and strata complexes.
Flood Testing
Traditional water ponding tests as required for compliance verification. Used when specified by standards or when electronic methods are not appropriate for the membrane type or location.
Ultrasonic Thickness Testing
Non-destructive measurement of dry film thickness to verify membrane application meets standards.
Adhesion Testing
Measures bond strength between membrane and substrate to verify proper adhesion and long-term performance.
Moisture Reading
Measures substrate moisture content to determine suitability for membrane application or diagnose water ingress.
Thermal Photography
Infrared thermography identifies moisture presence and temperature differentials behind surfaces without destructive investigation.
The right test depends on the membrane type, location, and application. Electronic leak detection alone has different approaches depending on the situation. Our team recommends the most appropriate method for each project.
NATA
Accredited (Site No. 25832)
Testing methodologies
Non-destructive
No damage to your build
Our NATA accreditation gives our testing reports the legal standing and independent credibility that certifiers, engineers, and courts require. ELD testing can also be used to determine maintenance requirements through the lifecycle of a waterproofing system.
NATA AccreditedAverage defect repair cost
of buildings have waterproofing defects
Defects identified and prevented
We work with commercial, strata, and residential properties across NSW, VIC, QLD, and nationally. Our remedial team includes specialists in Sydney, Melbourne, Brisbane, and Newcastle, also servicing Canberra, Wollongong, and surrounding areas.
“Diagnose quickly. Fix it once.”
42% of Australian buildings have waterproofing defects. The average repair cost is $283,000. When things go wrong, WI provides the independent expertise to diagnose the root cause, design the fix, and oversee the remediation, without any conflict of interest.
We work with engineers, remedial builders, waterproofing contractors, strata managers, developers correcting defects, and asset owners to provide:
- Diagnostic investigations — Combining applied water testing, thermal photography, moisture readings, and construction knowledge to identify or eliminate water ingress points. We work systematically to pinpoint the source, not just the symptom.
- Remedial design — Once the cause is identified, we design the rectification scope: specifying materials, detailing the approach, and defining the contractor scope of works.
- Contractor scope and management — We prepare clear scopes for contractors to quote against, and can manage the remediation process to ensure the fix is done right.
- Compliance testing of remedial works — After remediation, we test the new installation to verify effectiveness.
- Declared Designs (NSW) — For regulatory compliance, we provide documented waterproofing design declarations to support certification.
- Expert reporting — For strata disputes, builder defect claims, or insurance matters, our independent reports carry weight because we have no commercial interest in the outcome.
Who We Work With
We speak your language, not generic waterproofing jargon.
Builders
Protect your programme. Reduce rework.
Independent inspections and testing that catch defects before they become callbacks.
Developers
Protect your asset. Reduce your exposure.
Design reviews and testing that reduce warranty risk across your portfolio.
Asset Owners
Know what you own. Know what it costs.
Diagnostic investigations and condition assessments for existing buildings.
Architects & Designers
Design with confidence. Specify with proof.
Compliance reviews, performance solutions, and waterproofing design workshops.
Strata & Facility Managers
Find the source. Fix it once.
Diagnostic inspections and remedial management for water ingress in existing buildings.
Infrastructure
The cost of failure is measured in millions.
Testing and consultation for metro stations, tunnels, bridges, and civil infrastructure.
Where We Have Worked
From single dwellings to metro stations.
Tier 1 builders including
Lendlease, BESIX Watpac, CPB Contractors
Metro station
waterproofing consultation and testing
2,500+
projects nationally
Why Independence Is Everything
No product affiliations
We don’t sell membranes, coatings, or systems. Our advice is based on what’s right for your project, not what earns us a commission.
No contractor relationships
We don’t install and we don’t subcontract to installers. When we inspect or test, there is no commercial pressure to approve.
No conflicts of interest
When our report says a membrane has failed, it’s because the data says so. Our NATA accreditation means our testing has legal standing.
NATA Accredited
Accreditation No. 21463 | Site No. 25832
Accredited for testing and inspection of waterproofing systems.
AIW Member
Australian Institute of Waterproofing
David Previte, Founder — President of the Australian Institute of Waterproofing.
MBA NSW
Master Builders Association of NSW
Ready to Talk?
Tell us about your project. The right specialist will be in touch within 4 hours.
Offices in Sydney, Melbourne, Brisbane & Newcastle | NATA Accredited | Member of AIW