Bathroom Waterproofing Tips

Proper waterproofing in bathroom wet areas is absolutely vital

Bathroom waterproofing is a method which prevents water from penetrating your property floors and walls. It is extremely important for your bathroom renovation. In New South Wales, you can only do your own waterproofing if you’re licensed to do so.  Waterproofing has to be done in accordance with the Australian Standard AS3740-2010 - 'Waterproofing of domestic wet areas'.

most commonly used waterproofing materials in bathroom renovations

Bitumen based

Bitumen based waterproofing materials are not user-friendly enough in comparison with polyurethane or arcylic based coating. It also becomes very brittle and fragile when long exposure to the sunlight.  

Arcylic Based

Arcylic based waterproofing method is the most preferred method by licensed waterproofers and builders because of  its labour and time saving advantages. However, proper surface preparation is very important before and after the waterproofing. 

Poly based

Polyurethane based waterproofing should consist a primer coat and two top coats. The main advantage is the waterproofing layers can be tiled over, so to minimize the water content between the waterproofing layer and tiling layer. It also offers higher flexibility, but it is also more expensive to get the job done. 

Method We Commonly Apply

We use K10 Rapid polyurethane membrane for most of old bathroom renovation jobs, as this versatile waterproofing agent can be tiled over using cement based adhesives and is also suitable for commercial and residential works. 


K10 Rapid is a fast drying waterproofing membrane suitable for wall and floor application in showers and bathrooms. It is certified as a Class III membrane when tested to AS4858 Wet Area Membrane (highest category). Product tested and certified by CSIRO and BRANZ.


Contact Us For A Free Bathroom Quote Today.