Auckland Waterproofing Services
Bathroom Waterproofing for Auckland Homes
Proper waterproofing is one of the most important steps in any bathroom renovation. Before tiles are installed, a waterproof membrane protects the underlying structure from moisture damage and helps prevent leaks, mould and costly repairs. When installed correctly, it provides the foundation for a durable, long-lasting tiled bathroom.
At Cozy Tiling, we are certified waterproofing installers, providing professional waterproof membrane installation for bathrooms, showers, laundries and other wet areas across Auckland. We follow manufacturer specifications and New Zealand Building Code requirements to ensure every project is completed to a high standard.
Certified Waterproofing Installers
We are certified to install waterproofing systems from leading manufacturers, including Ardex, Bostik, Technokolla, Sika and Mapei. Using manufacturer-approved products and installation methods helps ensure your waterproofing system performs as intended beneath your tiled surfaces.
Whether you're renovating a bathroom, building a new home or completing an insurance repair, we use the waterproofing system that best suits your project and complies with the manufacturer's installation requirements.
1. Inspection
We inspect the substrate to ensure it is structurally sound, clean and suitable for waterproofing.
2. Surface preparation
Any defects are repaired and the surface is prepared to provide a strong bond for the waterproofing membrane.
3. Priming
A compatible primer is applied where required to improve adhesion.
4. Membrane application
The waterproof membrane is applied in accordance with the manufacturer's specifications to create a continuous waterproof barrier.
5. Reinforcing joints
Corners, junctions and penetrations are reinforced using approved tapes or bandages to strengthen areas most susceptible to movement.
6. Drying and curing
The membrane is allowed to dry and cure fully before any further work begins.
7. Final inspection
The completed waterproofing system is carefully checked to ensure it meets the required standard before tiling starts.
8. Tiling
Tiles are installed using quality adhesives and grouts to complete a durable and attractive wet area.
Why Choose Cozy Tiling?
Certified waterproofing installers
Certified in Ardex, Bostik, Technokolla, Sika and Mapei systems
Experienced in bathrooms, showers and laundries
High-quality workmanship
Work with homeowners, builders and insurance companies
Free quotations across Auckland
Frequently Asked Questions
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Waterproofing is one of the most important steps in any bathroom renovation. Before tiles are installed, a waterproof membrane creates a protective barrier that helps prevent water from penetrating the walls and floor. This reduces the risk of leaks, mould, timber rot and costly structural damage.
Although tiles and grout help protect the surface, they are not waterproof on their own. A properly installed waterproofing system provides the long-term protection hidden beneath the finished tiles.
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Yes, waterproofing is required in many wet areas under the New Zealand Building Code. Areas such as shower floors and shower walls must be waterproofed, and other areas may also require waterproofing depending on the bathroom design.
If you're unsure which parts of your bathroom require waterproofing, we're happy to explain the requirements during your quotation.
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The areas that typically require waterproofing include:
Shower floors, Kitchen floor and Toilette floor.
Shower walls
Wet room floors
Bathroom floors where required
Walls around baths in certain situations
Other wet areas depending on the design
The exact waterproofing requirements vary depending on the layout of your bathroom and the applicable building standards.
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Not in wet areas.
Before tiles are installed in showers and other areas requiring waterproofing, a waterproof membrane must first be applied over a suitable substrate. Installing tiles without proper waterproofing may allow moisture to penetrate behind the tiles, potentially leading to expensive repairs in the future.
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We are certified to install waterproofing systems from leading manufacturers, including Ardex, Bostik, Technokolla, Sika and Mapei.
We select the most suitable waterproofing system for each project and install it in accordance with the manufacturer's specifications to help ensure long-lasting performance.
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It normally takes from 1.5 to 2 days depending on weather and house location.
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Like any building system, waterproofing can fail if it is installed incorrectly, damaged during construction or applied over an unsuitable substrate.
Common causes include poor surface preparation, incorrect membrane thickness, inadequate reinforcement around corners and penetrations, or not following the manufacturer's installation instructions.
Using certified installers helps reduce these risks.
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Cozy Tiling is certified to install waterproofing systems from leading manufacturers, including Ardex, Bostik, Technokolla, Sika and Mapei. We understand that quality waterproofing begins with careful preparation and attention to detail.
From inspecting the substrate and applying the waterproof membrane to completing the tiled finish, we take pride in delivering workmanship that is built to last. We work closely with homeowners, builders and other trades to ensure every project is completed to a high standard.
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Yes. Where required, we can provide a PS3 (Producer Statement – Construction) for waterproofing installations completed by our qualified installers.
If your project requires a PS3 for council or building consent purposes, please let us know when requesting your quotation.
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In some situations, localised repairs may be possible. However, because the waterproof membrane is installed beneath the tiles, repairing a failed system often requires removing some or all of the tiled surface to access the membrane.
The best approach depends on the cause and extent of the problem. We can inspect the area and discuss the most suitable repair options.