Kitchen & Laundry Waterproofing Sydney | AS 3740 Compliant | Sydney One Waterproofing
AS 3740 Compliant Kitchen & Laundry Waterproofers in Sydney

Sydney's Trusted Kitchen & Laundry Waterproofing Specialists

Protect your kitchen and laundry from hidden leaks, swollen cabinetry and structural damage. Licensed Sydney waterproofers delivering AS 3740 compliant floors, walls and wet areas, backed by a 10-year warranty.

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Tell us about your kitchen or laundry project. We will get back within 24 hours.


AS 3740 Compliant
Australian Standard certified
NSW Licensed
Fully insured & accredited
Pre-Tile Specialists
Waterproofed before tiling
10-Year Warranty
On every completed job
Why It Matters

Why Kitchen & Laundry Waterproofing Matters in Sydney

Kitchens and laundries see constant water exposure from sinks, dishwashers, washing machines and daily splashes. Without a properly installed membrane, water can seep into floors, walls and cabinetry, leading to swollen kickboards, rotting timber and mould that often goes unnoticed until the damage is costly.

At Sydney One Waterproofing, we install AS 3740 compliant systems that protect these high-use wet areas from the source. Floors, wall junctions, under-sink zones and pipe penetrations are sealed using proven membranes engineered to handle years of daily use.

Protects cabinetry & joinery
Controls mould & mildew
Prevents structural damage
Protects property value
Liquid waterproof membrane being applied to a kitchen floor and wall junction
Services We Cover

Complete Kitchen & Laundry Waterproofing in Sydney

From a kitchen renovation to a full laundry fitout, our licensed crews waterproof every wet area and surface to AS 3740 standards.

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Kitchen floor waterproofing service in Sydney

Kitchen Floor

Full kitchen floor membrane application with sealed junctions and proper falls, protecting subfloors and adjacent rooms from spills and leaks.

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Kitchen splash zone and wall waterproofing

Kitchen Splash Zones & Walls

Waterproofing behind splashbacks and around sink walls to stop moisture seeping into framing, plasterboard and neighbouring spaces.

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Under-sink and wet area waterproofing

Under-Sink & Wet Areas

Targeted protection around sinks, dishwashers and appliance connections where slow leaks commonly start and damage cabinetry.

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Laundry floor waterproofing service in Sydney

Laundry Floor

Compliant laundry floor membranes with sealed floor wastes and wall upturns, built to handle washing machine overflow and daily wet use.

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Laundry wall waterproofing service

Laundry Walls

Wall waterproofing around tubs, taps and machine connections to NSW requirements, keeping moisture out of wall cavities and framing.

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Pre-tile waterproofing for kitchen and laundry

Pre-Tile Waterproofing

Membrane systems installed before tiling so your kitchen or laundry floor is sealed correctly from the substrate up, the right way.

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Warning Signs

Signs Your Kitchen or Laundry Needs Waterproofing

Catching the warning signs early can save thousands in repair costs. If you spot any of these, book a moisture inspection before damage spreads.

Peeling Paint or Wallpaper

Paint or wallpaper that lifts, bubbles or peels is often water infiltrating through walls and weakening the surface adhesion.

Musty or Damp Odours

A persistent musty smell, even after cleaning, usually points to moisture building up in concealed areas behind walls or under floors.

Wall or Ceiling Discolouration

Dark spots or staining on walls and ceilings indicate water penetration that can weaken the structure over time.

Swollen Cabinetry or Kickboards

Bowing, swelling or warping in cabinet bases and kickboards is a classic sign of water sitting where it should not be.

Lifting or Loose Floor Tiles

Tiles that lift, shift or sound hollow when tapped usually mean water has reached the substrate beneath the floor.

Stains on Ceiling Below

Brown rings or stains on the ceiling beneath an upper-level kitchen or laundry are a clear sign of waterproofing failure above.

AS 3740
Australian Standard Compliant
1-2 Days
Average Job Turnaround
10 Yrs
Workmanship Warranty
500+
Wet Areas Sealed in Sydney
Sydney One Waterproofing crew applying kitchen membrane
Proven 5-Step Process
How We Work

Our Kitchen & Laundry Waterproofing Process

01

Inspection & Substrate Prep

We start with a thorough inspection of the kitchen or laundry substrate to identify cracks, gaps and problem areas. Surfaces are cleaned, repaired and primed for membrane adhesion.

02

Sealing Joints & Penetrations

All wall and floor junctions, corners and pipe penetrations around sinks and appliances are sealed. Bond breakers and reinforcing fabric are applied to prevent membrane failure from movement.

03

First Membrane Coat

A flexible, liquid-applied membrane is installed across the floor, wall upturns, wet zones and around all drains, wastes and fixtures to the required coverage.

04

Second Coat & Full Coverage

A second membrane coat is applied to guarantee complete protection. Drying times are strictly observed between coats as per manufacturer guidelines and AS 3740.

05

Final QA & 10-Year Warranty

A thorough quality check confirms uniform coverage before we hand over your written 10-year warranty and compliance certificate for total peace of mind.

Compliance & Standards

Where Compliance Meets Craftsmanship

Every kitchen and laundry we waterproof meets the latest Australian Standards, the National Construction Code and NSW Fair Trading requirements.

AS 3740:2021

Waterproofing of Domestic Wet Areas

NSW Fair Trading

Licensed waterproofing contractor

National Construction Code

NCC compliant wet area systems

Manufacturer Approved

Certified application for full warranty

Client Reviews

What Our Sydney Clients Say

Real reviews from Sydney homeowners and builders who trusted us with their kitchen and laundry waterproofing.

"Waterproofed our kitchen during a full renovation. The crew sealed everything properly before the tiler came in, and the finish was spotless. No leaks, no fuss, and they kept us informed the whole way through."

R
Rebecca H.
Bondi · Kitchen Waterproofing

"Had a slow leak under the laundry tub that warped the cabinetry. Sydney One found the source, rewaterproofed the floor and walls, and sorted it properly. Fully compliant and backed by a written warranty."

T
Tom W.
Parramatta · Laundry Waterproofing

"We use Sydney One for kitchen and laundry waterproofing on our builds. Clean workmanship, on schedule, and the compliance certificates keep our certifier happy every time. Zero callbacks after handover."

N
Nathan P.
Chatswood · Builder, Kitchen & Laundry
Industries We Serve

Tailored Waterproofing for Every Sydney Sector

From single-room renovations to multi-level commercial sites, our crews deliver tested waterproofing systems that hold up to Sydney's coastal climate.

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Residential

Homes, townhouses, and renovations. Compliant waterproofing for bathrooms, balconies, kitchens and laundries.

Commercial

Offices, retail and hospitality fitouts. Minimal disruption with after-hours job options across Sydney.

Strata

Apartment buildings, common areas and remediation. We coordinate with strata managers from start to handover.

New Construction

Builders and developers trust us for code-compliant waterproofing across new builds and large-scale projects.

Honest Value

Quality Kitchen & Laundry Waterproofing at Fair Sydney Prices

Waterproofing your kitchen and laundry is never the place to cut corners. A poorly installed membrane costs many times more in repairs, cabinetry replacement and structural rectification down the line. We deliver work that is built to last, priced fairly, and quoted transparently with no hidden costs.

Size & Layout
Floor area, wall coverage and the number of wet zones in your kitchen and laundry impact the scope of work.
Substrate Condition
Existing damage, cracks, mould or remediation work needed before membrane application.
Membrane System
The grade and brand of membrane chosen based on the application area and use.
Access & Site Conditions
Strata, multi-level access and parking constraints can affect labour time on site.
What You Get

A Waterproofing Quote That Reflects Real Value

Every quote we send includes the full system specification, a written warranty and a compliance certificate. No surprises, no shortcuts.

  • Free on-site kitchen and laundry inspection
  • Written quote with full system specification
  • AS 3740 compliance certificate on completion
  • 10-year written workmanship warranty
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Enquiry

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On-site inspection within 24 hours
Licensed waterproofer assesses your kitchen or laundry
AS 3740 & AS 4654 compliant
Every project meets Australian Standards
Written quote in one business day
Clear pricing with no hidden costs

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We respond within 24 hours, Monday to Saturday.


FAQ

Kitchen & Laundry Waterproofing FAQs

Common questions about kitchen and laundry waterproofing in Sydney. Still curious? Our team is one call away.

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Kitchens are wet areas under the National Construction Code, so floors and key wet zones should be waterproofed to protect against leaks and spills. Requirements vary by floor type and level, which is why an on-site assessment is the best way to confirm what your kitchen needs.
Laundries are classified as wet areas and must comply with AS 3740 and the National Construction Code. This generally includes waterproofing the floor, wall junctions and areas around tubs and machine connections. We confirm the exact scope during inspection so your laundry meets all current standards.
Yes. Waterproofing should be installed on the substrate before tiling so the membrane sits beneath the tiles and protects the floor at its base. Tiling over an unwaterproofed floor leaves the structure exposed once grout and seals age. We always waterproof before the tiler starts.
Most residential kitchen and laundry waterproofing jobs in Sydney are completed within 1 to 2 days, depending on the size of the area and the membrane system used. Curing time before tiling is typically 24 to 48 hours.
Watch for peeling paint, musty odours, wall or ceiling discolouration, swollen cabinetry or kickboards, lifting floor tiles, or stains on the ceiling below. These are early signs the membrane has failed. Book a moisture inspection before further damage develops.
Every completed job comes with a written 10-year workmanship warranty, in addition to the manufacturer's product warranty on membranes and sealants used. You also receive a compliance certificate at handover.