How to Repair a Leaking Shower

A leaking shower is more than just an annoyance—it can cause costly water damage, mould growth, and higher utility bills if left untreated. The good news? Many leaks can be repaired with the right tools and know-how. Here’s a guide to spotting, diagnosing, and fixing leaking showers in your home.

In This Blog You’ll Learn:

• Common causes of leaking showers
• How to inspect and diagnose the issue
• Step-by-step instructions for simple DIY fixes
• When to reseal, re-grout, or replace parts
• How to prevent leaks from returning
• When to call a professional handyman

Why Showers Leak

Showers are exposed to constant water flow, steam, and movement, making them one of the most common sources of leaks in a bathroom. Common causes include:

• Worn seals and grout – Over time, seals around the shower base or tiles deteriorate.
• Cracked tiles – Even small cracks allow water to seep through.
• Damaged shower screens – Poorly sealed or loose screens can let water escape.
• Plumbing issues – Faulty taps, showerheads, or pipes hidden behind walls may be the culprit.

Identifying the root cause is essential before attempting repairs.

Step 1: Inspect the Source of the Leak

Before you start repairing, figure out exactly where the leak originates:

• Check seals – Inspect silicone around the shower base and corners.
• Examine grout – Look for cracked, missing, or discoloured grout lines.
• Run the shower – Observe if water is escaping from the screen or pooling around the base.
• Check plumbing – If water appears outside the shower without visible cracks, it could be a hidden pipe problem.

Tip: Place some tissue around suspected leak points while running the shower. Wet patches will reveal where water escapes.

Step 2: Fixing Minor Leaks Around the Shower Screen

If the water escapes due to gaps in the shower screen seal:

1. Remove old sealant using a utility knife or scraper.
2. Clean the area thoroughly with a bathroom-safe cleaner.
3. Dry completely—moisture prevents new sealant from sticking.
4. Apply fresh silicone sealant along the edges where the screen meets tiles and base.
5. Smooth the bead with a sealant tool or damp finger.

Allow the sealant to cure for 24 hours before using the shower.

Step 3: Resealing the Shower Base

A common cause of leaks is failed silicone seals around the shower tray or base.

• Remove all old silicone with a scraper.
• Use a mould remover if black spots are visible.
• Apply high-quality bathroom silicone along all joints.
• Let it dry fully before running the shower.

Step 4: Re-grouting Tiles

If cracked or missing grout is the issue:

1. Scrape out damaged grout with a grout saw or multi-tool.
2. Clean joints thoroughly to remove dust and debris.
3. Mix new grout according to the packet instructions.
4. Apply with a float at a 45-degree angle.
5. Wipe excess grout with a damp sponge.
6. Seal grout after curing to protect against water damage.

Re-grouting takes time but can save thousands in potential repairs.

Step 5: Fixing Leaky Showerheads and Taps

Not all leaks come from the structure—sometimes it’s the fixtures.

• Leaky showerhead – Remove it, soak in vinegar to clear mineral build-up, and replace worn washers.
• Dripping taps – Replace washers or cartridges, depending on the tap design.

These fixes are straightforward but may require a licensed plumber if pipes are damaged.

Step 6: When It’s a Plumbing Problem

If you suspect the leak comes from behind the wall, the job is no longer DIY. Signs include:

• Persistent damp patches outside the bathroom
• Mould growth on adjacent walls
• Water pooling under flooring

These leaks require professional help to prevent structural damage.

Preventing Future Leaks

Once repaired, it’s important to maintain your shower:

• Reseal every few years before the silicone deteriorates.
• Reapply grout sealer annually to keep tiles waterproof.
• Wipe down screens and tiles after use to prevent mould.
• Fix minor cracks immediately before they worsen.

A little upkeep goes a long way in avoiding costly water damage.

DIY vs Professional Repairs

Some leaking showers are simple fixes, like re-sealing or re-grouting, while others—especially plumbing leaks—are best left to professionals. Attempting complex repairs without experience can make the problem worse.

Engaging a reliable handyman service ensures the leak is diagnosed and repaired correctly the first time. Services like Jim’s Handyman specialise in home maintenance, saving you time, stress, and potentially thousands in long-term damage repairs.

Conclusion

Repairing a leaking shower quickly is essential to prevent further damage. While simple leaks can be managed with resealing or re-grouting, hidden plumbing issues need expert help. For trusted, professional shower repairs and bathroom maintenance, Australians turn to Jim’s Handyman—your reliable partner for keeping homes safe, functional, and stylish.