Laundry Waterproofing Perth

Yes. Under the Building Code of Australia and AS 3740-2021, laundry rooms are classified as wet areas and must be waterproofed. The floor must be waterproofed with the membrane turning up walls at least 150mm. Areas behind the trough and washing machine require wall waterproofing to a minimum height. The WA Building Commission enforces these requirements.

Laundry waterproofing in Perth typically costs between $800 and $4,000 depending on the size and complexity. A compact European laundry may cost $800–$1,500, while a standard separate laundry room ranges from $1,500–$2,500. Larger or combined laundry-bathroom spaces can cost $2,500–$4,000. These costs include membrane application, not tiling.

While there is no law preventing homeowners from doing their own waterproofing, it is strongly advised against. In WA, waterproofing that does not meet AS 3740-2021 standards can void your home insurance, fail building inspections, and cause costly water damage. Licensed waterproofing contractors carry appropriate insurance and provide warranties. Our service connects you with licensed professionals.

Failed laundry waterproofing can cause water damage to adjacent rooms, structural timber rot (particularly in Perth's older timber-framed homes), mould growth, and damage to flooring in nearby areas. Because laundries often have continuous water connections, even slow leaks can cause significant cumulative damage. Insurance may not cover damage from non-compliant waterproofing.

Yes. Any space containing a washing machine, trough, or other water-connected appliance is considered a wet area under the NCC and must comply with AS 3740-2021 waterproofing requirements. Even compact European laundry cupboards built into hallways or kitchens require proper waterproofing of the floor and splashback areas.