Wet Area Waterproofing

Licensed Indoor Waterproofing Services in Gold Coast & Brisbane for Builders, Renovators, and Property Managers.

Premium Indoor Waterproofing 

At S&S Remedial, we know how destructive water leaks can be to your property. Areas like bathroom & shower room, laundry area, kitchen, cellars, and basement are constantly exposed to the elements, making them some of the most common sources of water ingress in both residential and commercial buildings.

Our professional  indoor waterproofing services are designed to stop leaks at the source, protect your structure, and ensure long-term durability. With licensed and experienced wet area waterproofing specialists, we deliver reliable solutions that safeguard your property against water damage, structural issues, and costly future repairs.

Our Services Inclusions:

 

  • Waterproofing Kitchen Area
  • Laundry Area Waterproofing
  • Wet Area Waterproofing
  • Waterproofing Toilet Floor
  • Basement, Retaining Wall and Cellar Tanking
  • All Indoor Waterproofing
balcony-waterproofing-

Why Choose Us? 

Durability and Longevity

We use premium waterproofing systems designed to withstand Brisbane’s heat, coastal humidity, and sudden downpours. Whether it’s a bathroom, shower, or kitchen and laundry, our solutions protect against water ingress—reducing costly repairs.

Enhanced Safety and Comfort

Water damage in bathroom floor and shower wall can create slippery surfaces, promote mould growth, and compromise structural integrity. At S&S Remedial Waterproofing, we deliver professional bathroom waterproofing to help protect your home from costly repairs. Our trusted team ensures your bathroom stays safe, dry, and durable—giving you peace of mind and a healthier living environment for your family.

Professional Expertise

With over 20 years of experience, our Brisbane bathroom waterproofing specialists deliver expert solutions for balconies and roof decks of all sizes. We use proven industry methods combined with modern waterproofing techniques to achieve long-lasting, high-quality results. Every project is carefully assessed and customised to suit your property’s unique requirements, ensuring reliable protection and peace of mind.

Cost-Effective Investment

Waterproofing is more than just a quick fix — it’s a smart preventive solution. By sealing and protecting your concrete surfaces today, you can stop leaks before they start, safeguard against structural damage, and avoid costly repairs or early replacements down the track. A waterproof bathroom wall is a long-term investment and value of your property.

What Covers AS 3740: Waterproofing of domestic wet areas.

AS 3740 is the Australian Standard that sets out the requirements for waterproofing wet areas in residential buildings, such as bathrooms, laundries, toilets, and kitchens. 

What Are “Wet Areas”?  

  • Waterproofing bathrooms and ensuites
  • Waterproofing showers and baths
  • Waterproofing toilets and laundries
  • Waterproofing kitchens (especially near sinks and dishwashers)
  • Pre-formed shower bases, floor wastes, movement joints, and compatibility between waterproofing systems and finishes. (AS 3740:2021 update)

Key Requirements – Under AS 3740: waterproofing

  • Shower floors and walls must be fully waterproofed. 
  • Bathroom floors (if not concrete) must be waterproofed or water-resistant.
  • Junctions and joints (between floors, walls, and fixtures) must be sealed.
  • Membranes must extend a minimum height up walls (e.g., 150 mm from the floor, 25 mm over hobs, 1800 mm in showers).
  • Shower trays, bases, and pans must be fully sealed with graded membranes that direct water to the drain.
  • The system must be durable, flexible, and compatible with surrounding materials.
Who Must Follow It?

Builders, tilers, and waterproofing contractors must comply with AS 3740 to meet the NCC waterproofing standards. All requirements must be followed correctly, certified by a licensed applicator, and documented for compliance and inspection.

Terrace Helensvale GC

Our Indoor Waterproofing Process

At S&S Remedial, we take pride in protecting Brisbane & Gold Coast homes and businesses with reliable NCC waterproofing solutions. Whether it’s a leaking shower room, a soup-worn laundry area, or exposed kitchen areas, our process ensures long-lasting protection against water damage, structural issues, and costly repairs.

Inspection & Assessment

Every project begins with a thorough site inspection. We assess your kitchen, cellar, or basement to identify cracks, membrane failures, drainage issues, or signs of water ingress. This allows us to recommend the most effective NCC  waterproofing system for your property.

Waterproofing Application

Apply primers, and install a new, high-performance waterproofing roof sealant designed to withstand extreme weather and UV exposure. This method provides a clean slate and is ideal for roofs with multiple layers of failed waterproof roof coatings or extensive water damage.

Surface Cleaning & Preparation

This creates the perfect foundation for a seamless indoor waterproofing system.

  • Remove existing coatings or failed membranes
  • Repair concrete cracks and damaged substrates
  • Ensure surfaces are clean, dry, and ready for application

Detailing & Sealing

High-risk areas such as joints, edges, balustrade posts, and drainage outlets are reinforced with extra detailing to prevent leaks. We also seal penetrations and movement joints to guarantee a watertight finish.

Repair Cracks and Weak Spots

Our waterproofing  is a thorough process that starts with mechanical grinding to completely remove the existing roof waterproofing membrane and any delaminated material. This allows us to expose the bare roof slab for inspection and repair.  We then address any cracks or structural weaknesses.

Quality Check & Handover

Once the NCC waterproofing wet areas is complete, we conduct a detailed quality check to ensure everything meets industry standards. We’ll walk you through the finished work, giving you peace of mind that your indoor area is fully protected.

Bathroom waterproofing

QBCC Waterproofing Standards Covers ?

QBCC waterproofing standards are based on a combination of:

  • NCC Waterproofing wet areas
  • Australian Standards such as:
    • AS 3740 – Waterproofing of domestic wet areas 
    • AS 4654.2 – Waterproofing of external above-ground areas
  • QBCC’s own licensing and workmanship guidelines

These standards apply to all waterproofing work over $3,300 in value and require that the work be carried out by a QBCC waterproofing contractor.

Key Requirements
  • Waterproof membranes must be applied to all wet area floors and walls to specified heights
  • Junctions, penetrations, and corners must be reinforced and sealed
  • External areas like balconies and planter boxes must use UV-stable, flexible membranes
  • Work must be tested and documented before tiling or covering
  • Only licensed waterproofing contractors may perform or supervise QBCC waterproofing work in Queensland
Why It Matters

According to the QBCC, waterproofing defects are among the top 10 most common and costly building complaints, with average rectification costs nearing $25,000 per bathroom. Following QBCC standards helps prevent leaks, mould, and structural damage—and ensures warranty protection under the Queensland Home Warranty Scheme.

Where It Applies

 Internal Wet Areas (AS 3740)

  • Bathrooms and showers waterproofing
  • Waterproofing Toilets and powder rooms
  • Laundry area waterproofing
  • Ensuites waterproofing
  • Spa rooms and steam rooms

External Above-Ground Areas (AS 4654.2)

  • Waterproofing balconies and terraces
  • Waterproofing  roof decks and podiums
  • Waterproofing planter boxes
  • Retaining walls and parapets

STOP THE LEAK. PROTECT YOUR HOME.

Don’t wait until water damage compromises your cellar or concrete structure. Signs like damp patches, cracked grout, or stains under your bathroom or laundry are clear indicators of failed waterproofing. Protect your property with a licensed bathroom waterproofing specialist near you, delivering solutions that comply with all QBCC standards for long-lasting protection and peace of mind.

 Need Emergency Shower Waterproofing Service?
Call Us Today!

0468 760 750 | 0407 560 277

Brands We Trust

Testimonials

Testimonial

These team do such an excellent help in house renovation. I’ve used them for bathroom and kitchen waterproofing on a couple of houses now and wouldn’t go with anyone else. Thanks, S&S Remedial Services!

– Luke Harris

Testimonial

Stoked with the prompt kitchen waterproofing service and quality workmanship! Shawn and his expert team delivered the best waterproofing for our kitchen—highly recommend them to anyone looking for reliable, top-tier results.

– Dan Hamilton

Testimonial

I cannot fault these guys. They waterproof laundry floor on our property in Brisbane. Fantastic communication, streamlined process, and top-quality crew and workmanship. Highly recommend!

– John Becham

Testimonial

I was dealing with persistent water leaks on my bathroom and needed urgent help. I searched for a local waterproofing company in Gold Coast and found S&S Remedial. From the first call to the final application, they were professional, fast, and incredibly thorough. My bathroom is now completely sealed and leak-free, and I couldn’t be happier with the results. Highly recommend them to anyone facing  waterproofing roof issues.

– Lance Carlton

Testimonial

S&S Remedial Waterproofing provided excellent roof membrane for our house. The team was professional, efficient, and the results were flawless. No more leaks—just peace of mind, rain or shine!

– Daniel Reid

Testimonial

From start to finish, the AS 3740 waterproofing was handled with professionalism. Even under intense rain, the results have held up flawlessly. The team worked efficiently, and the membrane system delivered outstanding quality and durability.

– Chole Fraser

Frequently Asked Question

How do I find QBCC licensed bathroom waterproofing near me in Brisbane or Gold Coast, Queensland?

Search for QBCC-licensed bathroom waterproofing contractors near you in Google or ask for referrals from local builders, and directly inquire about the reputation and credentials of S&S Remedial Waterproofing Services. If you’re looking for NCC compliant bathroom waterproofing in my area, we invite you to visit our project showcase for reference. Our NCC bathroom & shower waterproofing specialists provide obligation-free but comprehensive quotations. S&S Remedial Waterproofing, your reliable local bathroom waterproofing experts are both QBCC, AS 3740 and NCC compliant and guarantee no hidden charges after project completion.

How much does wet area waterproofing cost in Brisbane or the Gold Coast?

Indoor waterproofing in Brisbane or Gold Coast typically costs between $40 and $100 per square metre, depending on the area treated, materials used, and complexity of the job.

How much does shower waterproofing cost in Brisbane or Gold Coast?

Shower waterproofing Brisbane & Gold Coast typically costs between $400 and $750, depending on the size of the shower area, the type of NCC shower waterproofing system used, and site conditions. For Queensland homes, this price usually covers:

  • Shower waterproofing membrane application to the recess, niches, tray, base, walls and floors
  • Surface preparation and priming
  • Compliance with AS 3740 waterproofing of domestic wet areas
  • Licensed Brisbane waterproofing contractor (required for insurance and QBCC certification)

If you’re renovating or building new domestic wet areas, NCC waterproofing is a mandatory step before tiling. Some wet area sealing contractors may charge per square metre—usually between $40 and $100/m²—especially for larger wet areas or complex layouts.

How much does concrete kitchen floor waterproofing cost in Brisbane or Gold Coast?

Concrete kitchen waterproofing Gold Coast or Brisbane area typically costs between $40 and $80 per square metre, depending on the NCC Kitchen waterproofing system used, surface preparation required, and site access. For a standard waterproofing kitchen floor of around 8–12 m², you can expect a total cost ranging from $320 to $960. S&S Remedial waterproof commercial kitchen flooring without hidden charges. We value trust and long-term relationship.

How much the NCC laundry waterproofing cost in Gold Coast and Brisbane?

AS 3740 or NCC Laundry waterproofing in Brisbane and the Gold Coast typically costs between $400 and $800, depending on the size of the area, the condition of the substrate, and the type of NCC kitchen & laundry waterproofing system used. Most local wet area sealing contractors near you charge $40 to $80 per square metre, which includes surface preparation, membrane application, and compliance with AS 3740 waterproofing standards for wet areas.

How much does cellar waterproofing cost in Brisbane and Gold Coast?

Cellar waterproofing Gold Coast and Brisbane typically costs between $800 and $3,000 for small projects (20–30 m²), depending on the condition of the structure, type of AS 3740 waterproofing system, and site access. SS Remedial’s wet area sealing specialists guarantee QBCC cellar waterproofing — professionally installed, fully certified, and built to meet AS 3740 and NCC standards.

🧱 Cost Breakdown:

  • Per m² rate: $40 to $100 for basic membrane systems
  • Cellar Tanking systems: $100 to $150 per m², especially for high-pressure or flood-prone areas
  • Add-ons: Sump pumps, French drains, or crack injection may increase costs

Factors That Influence Pricing:

  • Extent of damp or water ingress
  • Type of substrate (concrete, brick, stone)
  • Interior vs exterior access
  • Need for drainage or ventilation upgrades
  • QBCC waterproofing compliance and certification requirements

S&S Remedial and other local specialists offer AS 3740 interior waterproofing solutions that avoid excavation, making them ideal for tight-access sites or heritage homes.

How much does it cost to waterproof bathroom wall or floor?

In Brisbane and the Gold Coast, bathroom floor waterproofing typically costs between AUD $70 and $135 per square meter, depending on factors like surface condition, access, and the NCC bathroom waterproofing system used. For small to mid-sized bathroom, total project costs usually range from AUD $1,800 to $4,500, including surface prep, membrane application, and warranty-backed finishes.

Are house renovators or builders from Brisbane and the Gold Coast also QBCC-licensed waterproofer?

No, a builder or renovator in Brisbane or the Gold Coast is NOT automatically a QBCC-licensed waterproofer.

Waterproofing is a Regulated Trade
In Queensland, waterproofing is legally considered a separate, specialised trade under the regulation of the Queensland Building and Construction Commission (QBCC).

Separate Licence Required:
Any contractor or waterproofing company performing a indoor waterproofing services with a value over $3,300 (including labour and waterproofing materials) must hold a specific QBCC Waterproofing License (CPC31420 Certificate III in Construction Waterproofing).

Mandatory Certification: Only a QBCC-licensed waterproofer can legally carry out the work and issue the mandatory QBCC licensee aspect certificate (Form 43 or Form 16) to the building certifier or owner for compliance.

Brisbane Builders and contractors usually partner with S&S Remedial for all residential and commercial NCC & AS 3740 waterproofing works.

What areas are covered during toilet waterproofing

Toilet waterproofing typically includes the floor slab, wall junctions, pipe penetrations, and the area around the toilet pan. Waterproofing membranes are applied before tiling to create a sealed barrier that prevents water from seeping into the substrate. For upstairs bathrooms or slab-on-ground homes in Brisbane and Gold Coast, this step is critical to avoid costly water ingress and rising damp.

Do I need a licensed contractor for toilet waterproofing?

Yes, in Queensland, any toilet waterproofing work valued over $3,300 must be performed by a QBCC-licensed contractor. Even for smaller jobs, hiring a licensed professional ensures the work meets Australian Standards (AS 3740) and protects your home from future leaks or compliance issues.

Do local waterproofing company like S&S Remedial offer any warranty?

We offer a workmanship warranty of up to 6.5 years from practical completion, along with a manufacturer or product warranty that typically ranges from 7 to 20 years, depending on the shower or bathroom waterproofing membrane specified. Our indoor NCC waterproofing services are all backed by these warranties to ensure long-term protection and peace of mind.

Do Building Codes Mandate Waterproofing in Bathrooms and Laundries?

Yes—Queensland building codes (QBCC) do mandate waterproofing in bathrooms, laundries, retaining wall, and other wet areas to prevent water damage, mould growth, and structural deterioration.

Key Standards:

– AS 3740 Waterproofing of domestic wet areas

This is the primary standard for internal wet area waterproofing in residential buildings. It outlines requirements for:

  •  Shower walls and floors
  •  Bathroom and laundry floors
  •  Junctions between walls and floors
  •  Penetrations (e.g. pipes, drains)
  •  AS 4654 – Waterproofing membranes for external above-ground use

Legal & Compliance Notes:

  •  Waterproofing must be done by a licensed contractor (QBCC-licensed in Queensland).
  •  A waterproofing certificate is often required for insurance, council approvals, or resale.
  •  Non-compliance can lead to failed inspections, costly repairs, and voided warranties.
Is waterproofing required in kitchens under Australian Standards?

Yes — under Australian building regulations and standards, waterproofing is required in many indoor wet areas, and kitchens fall under certain conditions.

Here’s a clear breakdown:

National Construction Code (NCC) / NCC Housing Provisions + Wet Areas Provisions

The NCC references and enforces wet area waterproofing or water-resistance requirements. For example, building elements in wet areas must be “waterproof or water resistant” according to Table 3.8.1.1 and comply with AS 3740.

Kitchens / Bench-top Vessel Areas
In some states, the NCC/wet area rules explicitly require water‐resistance in zones around kitchen sinks, bench-top vessels, and junctions over a certain height.

How Much of the Laundry Room Needs to Be Waterproofed?

Building codes typically specify the minimum requirements for waterproofing in wet areas. In a laundry room, this generally includes:

  • The entire laundry floor.
  • The walls up to a certain height, especially around the washing machine and any sinks. It’s good practice to extend the waterproofing at least 150mm up the walls.
  • The junctions between the floor and walls.
  • Any penetrations in the floor and walls for plumbing or electrical wiring
How Much Does It Cost to Waterproof a Laundry Room?

The cost of waterproofing a laundry room can vary significantly based on several factors, including:

  • The size of the room.
  • The extent of waterproofing required.
  • The condition of the existing surfaces.
  • The types of materials used.
  • Your location and local labor rates.

It’s best to obtain quotes from S&S Remediall laudry room waterproofing contractors to get an accurate estimate for your specific project.