Do I Need to Waterproof My Shower?

Water damage can be harmful to your property. From mould growth to structural damage, water leaks can have serious consequences. This can be avoided by waterproofing your shower, bathroom walls and flooring. In waterproofing, a special membrane is applied on all the bathroom surfaces so water cannot penetrate the materials.

Building materials are not waterproof

Cement board, tiles and grouts are not waterproof. If your builder didn’t waterproof your bathroom, it will lead to a major structural damage and it can be expensive to fix.

What happens if you do not waterproof your shower?

One of the early signs of water damage is mould growth on the grout. Although mould can be cleaned with the help of chemicals, water can seep inside the drywall, making it expand. This creates pressure on the shower tiles and causes them to crack.

Water damage can also peel off the paint and cause the flooring to break. If it is not fixed, it can cause the wood to rot and weaken the foundation of your home.

Can you DIY Bathroom Waterproofing?


Unless you are licensed, you shouldn’t attempt to DIY your bathroom waterproofing.

Waterproofing Standards for Bathrooms

According to the Building Code of Australia and AS 3740:

  • Shower walls must be waterproofed up to at least 1800 mm
  • Entire shower floor must be waterproofed
  • The walls must be waterproofed up to at least 150mm
  • Entire bathroom floor must be waterproofed - if the floor is made of timber, plywood or particleboards, or if it is above the ground floor of the house
  • 100 mm over the hob or step down onto the bathroom floor

These are the minimum requirements and you can choose to waterproof more than this to protect your bathroom from damage.

How is Waterproofing Done?

The walls and shower area is cleaned and primer is applied. Once the primer is dry, silicone seal is applied to all the gaps and joins.

It is allowed to dry and a liquid waterproof membrane is applied to all the areas.

What if your Bathroom needs Waterproofing?

Waterproofing lasts for 7-10 years. If you have noticed a water leak in your shower, your waterproofing membrane might be damaged and can be reapplied again. Waterproofing should be done by a licensed and insured professional.

Need to Waterproof your Bathroom?

Contact our experts today on 07 3063 5633 or complete our online waterproofing enquiry form to get a free quote.

Our Unique Renovation Process


Understanding your needs

We will ask you a series of questions to understand the requirements of your renovation in more detail.


Solve your problem

A solution will be established based on your requirements along with an estimate for your project.


Design consultation

This is where we go through the style and design elements of your renovation (layout, products, tiles and colour options). We will also assess structural and plumbing changes.



After we have created a style and design concept for your renovation, you'll be able to view your products and tiles and make your final selections.


Deliver on our promise

We have established an experienced team and implemented systems that have a customer focused approach to deliver a high quality and efficient renovation.

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    A truly great experience. From quote to finish the team from Master craft Tiling were easy to work with and professional.

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    Master Craft have just finished tiling our pool deck and we are extremely satisfied with the quality of their work. The Tiler, Dave, was efficient and on time and his attention to detail was excellent. We would use them again and are happy to recommend their services.

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  • 21-10-2019

    We used Mastercraft Tiling to renovate three bathrooms at our property. The whole process, end to end, was exceptional. Raymond was amazing and took real care over every step of the job. All trades involved were excellent to deal with. The job started and finished exactly on time and has exce...

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    Raymond and Vince were very easy to deal with, and provided great solutions to a tired looking concrete patio. The workmanship is of the highest standard, and the tiled back patio looks amazing. I would highly recommend Master Craft tiling to anyone for their tiling needs. I certainly will be usi...

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    We recently completed an extensive city apartment renovation with the MasterCraft team and couldn’t be happier with the outcome and experience. From the first meeting for quotation to the final walk through the teams attention to detail and high standards was clear. The work was completed on time...

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