Shower waterproofing Sydney
Specialist shower waterproofing in Sydney. Licensed contractors installing AS 3740-compliant membranes for shower recesses, walk-in showers, and wet rooms across the Sydney metro area.
What Is Shower Waterproofing?
Shower waterproofing is the specialised application of waterproof membranes to the floor, walls, and junctions of shower recesses, walk-in showers, and wet rooms. In Sydney, shower waterproofing must meet AS 3740 requirements and be performed by a licensed waterproofer registered with NSW Fair Trading. The membrane creates an impervious barrier preventing water from penetrating into the building structure, protecting your Sydney home from moisture damage and mould.
Shower Waterproofing Cost in Sydney
Typical pricing: $70 - $130 per m²
Shower Recess Only
Standard shower base and walls up to 1800mm, including hob and corner treatments
Walk-in Shower
Larger hobless or walk-in shower with extended wall coverage and floor grading
Wet Room / Full Enclosure
Full wet room conversion with floor-to-ceiling membrane and linear drain integration
Shower Waterproofing Methods We Use in Sydney
- 1Liquid-applied polyurethane membranes for seamless coverage
- 2Sheet membrane systems with welded seams
- 3Cementitious tanking for shower bases
- 4Hobless shower threshold detailing with recessed channel drains
- 5Silicone and polyurethane sealant systems for movement joints
Quick Quote
Price range: $800 – $4,500
Per m²: $70 - $130 per m²
Compliance: AS 3740 Wet Area Standard
Licence: NSW Fair Trading Licensed
Our Shower Waterproofing Process in Sydney
Every project follows our proven process to ensure compliance with Australian Standards and NSW regulations.
Free inspection and measurement of your shower area at your Sydney home
Strip existing tiles and remove old waterproofing membrane
Repair substrate defects, fill cracks, and level the shower base
Install or repair the shower hob (curb) or prepare hobless threshold
Apply bond-breaker tape and pre-formed corners to all internal angles
Prime all surfaces and apply the first coat of waterproof membrane
Apply second coat of membrane perpendicular to the first
Allow full cure time (minimum 24 hours) before flood testing
Conduct flood test and issue AS 3740 compliance certificate
When You Need Shower Waterproofing in Sydney
- You are building a new shower or renovating an existing one in your Sydney property
- You notice water staining or damp patches on walls or ceilings near your shower
- Grout lines in your shower are cracking, discoloured, or crumbling
- You want to convert a bathtub space into a walk-in shower
- Your shower base feels spongy or tiles are becoming loose underfoot
Why Use a Licensed Waterproofer in Sydney
NSW Fair Trading requires waterproofing work to be carried out by licensed professionals. Here is why that matters for your Sydney property:
Shower waterproofing is classified as specialist work under NSW regulations and requires a Waterproofing Licence
Licensed waterproofers are required to carry professional indemnity and public liability insurance in NSW
A compliance certificate from a licensed waterproofer is needed for building certification in Sydney
NSW Fair Trading can impose penalties on homeowners who engage unlicensed tradespeople for wet area work
Licensed professionals guarantee their work meets current AS 3740 standards, protecting your investment
Shower Waterproofing FAQs - Sydney
Frequently Asked Questions
Shower waterproofing in Sydney ranges from $800 for a simple shower recess to $4,500 for a full wet room conversion. The average Sydney shower waterproofing job costs around $1,500 to $2,500. Contact us for a free on-site quote tailored to your shower configuration.
If you are renovating your shower in Sydney, yes, the entire shower area must be re-waterproofed to current AS 3740 standards regardless of whether the existing shower is leaking. This is a legal requirement under the Building Code of Australia enforced by NSW Fair Trading.
Under AS 3740, shower walls in Sydney must be waterproofed to a minimum of 1800mm above the finished floor level, or 150mm above the showerhead outlet, whichever is higher. For walk-in showers without a hob, the membrane must extend to at least 1500mm from the shower rose on adjacent walls.
Absolutely. Hobless (step-free) showers are increasingly popular in Sydney homes and can be fully waterproofed using graded screed falls, linear drain systems, and extended membrane coverage. Our licensed Sydney waterproofers specialise in hobless shower installations compliant with AS 3740.
Failed shower waterproofing can cause water to penetrate into wall cavities and floor structures, leading to timber rot, mould growth, and damage to adjoining rooms. In Sydney apartments, it can also affect neighbouring units, potentially resulting in strata claims. Early detection and re-waterproofing is far more cost-effective than structural repairs.
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