The bathroom is the largest wet area in most homes so it’s absolutely vital that it is correctly waterproofed. If it isn’t, water will seep through to the structure over time, potentially causing serious damage.  However, just because waterproofing the bathroom is a must doesn’t mean that you know everything there is to know about it!  That’s why we’ve put together these FAQs.  If you have any more questions, your local waterproofer will be only too happy to help.

What is Waterproofing?

Waterproofing is the process of applying a special membrane or product that will waterproof a surface so that water cannot get through it at all.

Why Do I Need to Waterproof My Bathroom?

Waterproofing the bathroom is essential to avoid water damage and the associated problems.  Some issues you may face due to incorrect or nonexistent waterproofing include rotting or warped structural timbers, plasterboard decay, mould, mildew, rising damp, peeling paint, and the corrosion of metal structures.

What Needs to be Waterproofed in the Bathroom?

As the bathroom is the largest wet area in the home, you’ll need to waterproof the entire bathroom floor, the shower walls up to 1800mm high, all other walls at least 150mm high, and at least 100mm over the hob or the step down to the floor.  This is the minimum standard however so you may wish to go further, waterproofing the walls all the way up for example.

Do Standards Apply to Bathroom Waterproofing?

They certainly do!  The minimum standards are set out in the Building Code of Australia and Australian Standards (AS 3740-1994).

What Options Do I Have for Waterproofing My Bathroom?

There are several different types of waterproofing products available including sheeting, membranes, and paint on/spray on products. Spray on or paint on waterproofing tends to be the most commonly used, however.

How Long Does Waterproofing Last?

Most waterproofing products will come with a warranty of around ten years but correctly applied, it should last for much longer.

What if I Have Leaks in My Bath or Shower?

If you have leaks in your existing bath or shower, you don’t have to rip the tiles off the wall to re-waterproof.  There are waterproofing products that can be applied directly over the tiles, fixing the problem.

Who Should I Get to Waterproof My Bathroom?

Waterproofing should always be applied by a qualified and licensed waterproofer.  This is actually a requirement of many local councils.

How Long Before I Can Use My Bathroom?

You’ll need to wait for the waterproofing to completely dry before you can use the bathroom, or continue on with renovations.  Your waterproofer will tell you how long this will be.  The curing or drying process can be as long as five days depending on your climate.