+61394378997 sales@flexitray.com.au

Internal Waterproofing

Bathrooms, Laundries & Wet Areas

For over four decades, Flexitray Waterproofing has been safeguarding homes with waterproofing systems designed for Australia’s interior spaces. From bathrooms to powder rooms, we ensure every installation complies with AS3740 and the NCC Housing Provisions Volume 2.

Whether you’re managing a high-density build or a custom home, our methods offer long-term defence against leaks and damage.

Areas We Waterproof

Bathrooms
& ensuites

Laundries
& powder rooms

Showers, bath podiums, floor–wall junctions

Timber or
concrete subfloors

Why Internal Waterproofing Matters

Shower bases, bath areas, and corners are common trouble spots.
Leaks here can lead to hidden mould, swelling timber, and high repair costs.
That’s why we take extra care on every project, applying:

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Water stop angles at entry points

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Dual membranes, under and over screeds, where required

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Proper curing time (at least 48 hours, more in cooler conditions)

We are trusted by builders across Melbourne and regional Victoria for reliable bathroom and laundry waterproofing that stands the test of time.

Download Technical Data Sheets

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Why Builders Work With Us

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40+ years focused on wet area waterproofing
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Certified team (Certificate III in Construction Waterproofing)
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Safety-first approach under WorkSafe Victoria
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Reliable results across residential projects in Melbourne and wider Victoria
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