Most showers leak because the waterproofing system underneath the tiles has broken down. Once this layer fails, water seeps into the walls and floor where it causes hidden damage.
This guide explains the signs of waterproofing failure, why it happens, and what you should do next.
Waterproofing is the membrane beneath the tiles that stops water entering the structure of your home.
A shower can look perfect on the surface, but if the membrane has failed, leaks will still occur.
These signs often appear before a major leak:
Moisture moves into wall cavities and pushes the paint away from the surface.
Timber absorbs water and expands.
Moisture weakens the glue or substrate beneath the tiles.
Cleaning removes the surface mould, but moisture behind the tiles brings it back.
These spots often grow larger over time.
This indicates poor drainage or water escaping beyond the shower zone.
If you notice even one of these issues, the waterproofing may be compromised.
There are several common causes:
Once the membrane is damaged, it does not repair itself. It continues to break down.
Aquatech uses specialised detection equipment to locate moisture and find the exact problem.
Highlights temperature differences caused by moisture.
Measure the amount of water inside walls and floors.
Helps identify the source of the leak.
A clear diagnosis ensures you receive the correct repair solution.
Suitable for minor leaks caused by worn grout or silicone.
Needed when the waterproofing itself has broken down or the substrate has been damaged.
This involves:
A rebuild restores the shower to a fully compliant, watertight condition.
Waterproofing failure is not something to delay. The longer moisture spreads, the more expensive the repair becomes.
Aquatech Grouting provides expert leak detection, regrouting and full shower rebuilds across Brisbane and South East Queensland.
