+61394378997 sales@flexitray.com.au

Trusted Waterproofing for Builders – Over 40 Years of Proven Results

Expert waterproofing and screeding solutions delivered across Victoria.

Compliant with AS3740 (bathrooms), AS4654.2 (balconies & exteriors), and the NCC Housing Provisions Volume 2.

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Our Services

Internal Waterproofing

Covering bathrooms, laundries, and wet areas, all fully compliant with AS3740.

External Waterproofing

Solutions for balconies, rooftops, basements, planter boxes, and retaining walls, following AS4654.2.

Screeding

Expert screeding for shower bases, wet area floors, balconies, and full-room applications including accessible living zones.

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Why Builders Choose Flexitray

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Over four decades of hands-on waterproofing experience as residential waterproofing specialists

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Certified applicators (Certificate III in Construction Waterproofing)
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Fully OH&S compliant, operating under WorkSafe Victoria procedures
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Always aligned with AS3740, AS4654.2, and NCC Housing Provisions
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Headquartered in Victoria, with service branches in Queensland and Western Australia

Compliance & Certifications

Standards Australia | NCC | WorkSafe Victoria | HIA/MBA

“Every Flexitray project is delivered in accordance with AS3740, AS4654.2, and the NCC Housing Provisions Volume 2.”

Years of Proven Results

Completed Projects

Trusted by Leading Brands

Who We Are

With over 40 years of industry experience, Flexitray has become one of the most trusted waterproofing contractors in Victoria, partnering with builders across Australia. From multi-unit developments to single homes, our waterproofing and screeding solutions are built for compliance, quality, and long-term performance.

We work with high-volume residential builders, mid-density developers, and owner-builders throughout Victoria. Our team delivers every job with a focus on meeting national construction codes and protecting what matters most—your projects and your reputation.

About Us

Call For a Quote:

(03) 9437 8997

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Technical Resources

Looking for specifications? We’ve got you covered.

Includes full details on compliance and installation for bathrooms, balconies, and screeding applications.

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Crommelin Waterproofing Systems
We supply and recommend Crommelin membranes, primers and accessories for bathrooms, balconies and screeding applications. Flexitray 101 and Flexitray 102 are proprietary membranes developed with Crommelin for our installation teams and are not sold separately. Access Crommelin technical data sheets and installation guides below.

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Ardex Waterproofing Systems
High-performance membranes ideal for demanding residential and commercial projects.

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RLA Waterproofing Systems
Reliable, cost-effective waterproofing and adhesives for builders and tilers.

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Durotech Membrane Systems
Reliable, cost-effective waterproofing and adhesives for builders and tilers.

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Atlantis Waterproofing Solutions
Specialised waterproofing technologies for structural and landscaping applications.

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Tremco Waterproofing Systems
Premium membranes designed to withstand extreme conditions and ensure compliance.

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Client Testimonials

“Flexitray has handled our waterproofing for years—always reliable, always compliant.”
Builder, Melbourne

“The workmanship is excellent and the team consistently delivers on detail.”
Developer, Victoria

“Flexitray has handled our waterproofing for years—always reliable, always compliant.”
Builder, Melbourne