Introduction
A leaking shower can sneak up on you — first, it’s a musty smell, then peeling paint or a dark patch on the wall. While most people assume it’s a plumbing issue, the real cause is usually much simpler (and cheaper to fix). In this article, we’ll explore the most common causes of leaking showers and how you can prevent serious damage without ripping up your tiles.
Common causes of a leaking shower
1. Cracked or missing grout
Grout is the protective barrier between your tiles. When it cracks, loosens, or wears away, water seeps behind the tiles and into the wall or floor.
2. Deteriorated silicone sealant
The sealant around your shower edges, taps, and screens can break down over time — especially in high-moisture areas. When this happens, leaks can develop at the corners or base.
3. Movement in the shower base or walls
Buildings settle, and bathrooms shift slightly over time. Even small movements can cause tiles to loosen or grout to crack, creating a path for water to escape.
4. Poor waterproofing under tiles
In older bathrooms or DIY renovations, the waterproofing membrane beneath the tiles might be compromised or missing entirely.
5. Blocked or misaligned drainage
If water doesn’t flow efficiently down the drain, it can pool and eventually force its way into gaps in the grout or tile joints.
Warning signs to watch for
● Mould or mildew that keeps coming back
● Damp smells that won’t go away
● Peeling paint or soft wall surfaces outside the shower
● Discolouration or watermarks on ceilings or flooring below
● Cracked or discoloured grout
How to prevent a shower leak
✔ Maintain your grout and sealant
Keep an eye on your grout lines and reseal when needed. Don’t ignore small cracks — they’re often the first warning sign.
✔ Keep your shower clean and dry
Remove soap scum, which breaks down grout faster. Use a squeegee after showering to reduce water buildup.
✔ Get a professional inspection
If you notice leaks or damage, act fast. A professional service like Leaking Showers Sealed can assess the issue and fix it — usually without removing tiles.
You don’t always need a full renovation
Many homeowners assume a leaking shower means big bucks and broken tiles. But in most cases, professional regrouting and resealing is all it takes to stop the leak and restore your bathroom.
Need help fixing a leaking shower?
At Leaking Showers Sealed, we specialise in stopping shower leaks without removing tiles. Our experts can regrout, reseal, and waterproof your shower recess with minimal disruption—and long-lasting results.