Leaking Shower Repair vs Replacement — What’s Cheaper?

When a shower starts leaking, the first fear is usually “this is going to cost a fortune.” Sometimes it does — but often it doesn’t. The key is diagnosing the actual source of the leak before doing any work. Here’s how to think about it.

First: Where Is the Water Actually Coming From?

Not all shower leaks are equal. The cheapest fix is a worn mixer tap cartridge — under $300 in most cases. The most expensive is a failed waterproofing membrane requiring a full tile removal and regrouting — typically $3,000–$8,000. These two scenarios look almost identical from the outside (water on the bathroom floor), but require completely different solutions.

Signs It’s Just a Tap Issue (Cheap Fix)

• Water drips from the showerhead when the tap is off
• The shower screen frame is wet but the walls are dry
• The leak is from the mixer tap handle area

In these cases, we replace the cartridge inside the mixer tap. Most repairs are done in under an hour and cost $200–$400.

Signs It Might Be Waterproofing (Expensive)

• Water staining on the ceiling below the shower
• Soft or hollow-sounding tiles when tapped
• Mould growing behind tiles or on the wall next to the shower
• Grout that crumbles or is discoloured at the base
• The shower has been leaking slowly for years

The Honest Answer

A licensed plumber should always diagnose a leaking shower before any quotes are given. We’ve saved Melbourne homeowners thousands by correctly identifying that a “waterproofing leak” was actually a worn cartridge. We’ve also warned homeowners when a cheap fix won’t solve the real problem — because patching over a membrane failure just delays the damage.

What About DIY Grout Sealers?

Surface sealers applied over existing grout are almost never a long-term fix for a shower that’s leaking into the subfloor or wall cavity. They can buy a few months, but water finds a way through eventually. If there’s already structural moisture damage, sealer makes it harder to diagnose the extent later.

Get a Proper Diagnosis First

Call Sedcon Plumbing on 0468 013 012. We’ll identify exactly what’s causing your leaking shower in Melbourne and give you an honest assessment of what’s needed. More about our leaking shower service.

VBA Licence 120392 · admin@sedconplumbing.com.au

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