What Is Laundry Waterproofing?
Laundry waterproofing is the application of a compliant waterproof membrane to the floor and lower walls of a laundry to prevent water damage from washing machines, tubs, and trough overflows. Under AS 3740-2021, laundries are classified as wet areas in Brisbane and must be waterproofed to specific standards by QBCC-licensed waterproofers. We connect you with QBCC-licensed waterproofers who apply proper laundry waterproofing to protect your home from the gradual water damage that washing machine leaks and splashes cause over time.
When Do You Need Laundry Waterproofing?
We connect you with QBCC-licensed waterproofers when:
- You are renovating or building a new laundry
- The laundry floor is being tiled or re-tiled
- You notice damp patches, mould, or staining around the laundry area
- The washing machine has overflowed and damaged flooring
- You are converting another room to include laundry facilities
Methods and Materials
QBCC-licensed waterproofers in Brisbane use a range of proven methods for laundry waterproofing:
- Liquid-applied polyurethane membranes
- Cementitious waterproofing coatings
- Sheet membrane under tiled floors
- Hob containment around washing machine area
- Flashing tape at wall-floor junctions
Laundry Waterproofing Cost in Brisbane
Costs vary based on size, condition, access, and the membrane system used. Here are typical Brisbane price ranges:
Compact Laundry
European laundry or cupboard laundry
$800 – $1,500
Standard Laundry
Separate laundry room 3-6m²
$1,500 – $3,000
Large Laundry / Combined
Large or laundry-bathroom combination
$3,000 – $5,000
Typical rate: $55 – $100 per m²
Want a detailed cost breakdown? See our full Laundry Waterproofing cost guide.
AS 3740-2021 Requirements
In Brisbane, laundry waterproofing is regulated under Australian Standard AS 3740-2021 and the QBCC Act 1991. The QBCC (Queensland Building and Construction Commission) oversees compliance. Key requirements include:
- Waterproofing must be applied by a QBCC-licensed waterproofer
- Membranes must meet minimum thickness and continuity requirements
- A flood test must be conducted before any tiling work begins
- A QBCC Form 43 compliance certificate must be issued upon completion
Learn more in our complete AS 3740-2021 guide.
The Laundry Waterproofing Process
When we connect you with a QBCC-licensed waterproofer in Brisbane, here is the typical process they follow:
- 1Remove existing flooring and inspect substrate
- 2Repair substrate and ensure correct falls to floor waste
- 3Prime substrate and apply bond breakers at junctions
- 4Apply flashing tape to corners and penetrations (taps, wastes)
- 5First coat of liquid membrane applied to floor and walls
- 6Second coat applied after drying time
- 7Waterproof wall areas behind tub and washing machine
- 8Conduct flood test (24 hours)
- 9Issue QBCC Form 43 compliance certificate
- 10Proceed with tiling or floor covering installation
Why Choose a QBCC Licensed Waterproofer
We only connect you with QBCC-licensed, insured waterproofing professionals in Brisbane. Here is why that matters:
- Laundry waterproofing is a compliance requirement under AS 3740-2021
- A QBCC Form 43 compliance certificate is needed for building approval in Queensland under the QBCC Act 1991
- Washing machine leaks are a leading cause of insurance claims in Brisbane homes
- QBCC-licensed applicators know the specific membrane heights required for laundries
- Proper falls and floor waste installation prevent long-term water pooling
Already Have a Leak?
If you are dealing with an active leak or water damage, time is critical. The longer water penetrates, the more expensive repairs become. We can connect you with emergency waterproofers in Brisbane.
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