URGENTTypical cost: $800 – $4,500

Leaking Shower Repair Perth

A leaking shower is the most common waterproofing failure in Perth homes. Every day you wait, water is seeping into your walls and subfloor, causing hidden structural damage.

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Leaking showers account for the majority of waterproofing callouts across Perth. The problem is often invisible at first — water migrates through failed grout joints, cracked membranes, or deteriorated silicone seals, travelling along timbers and pooling where you least expect it. By the time you notice damp patches on the ceiling below or bubbling paint in an adjacent room, significant damage may already have occurred. We connect you with licensed Perth waterproofing contractors who specialise in diagnosing and repairing shower leaks, from simple resealing jobs through to full membrane replacements.

Signs You Have This Problem

Water stains or damp patches on the ceiling below the bathroom

Bubbling, peeling, or discoloured paint on walls adjacent to the shower

Musty or mouldy smell in and around the bathroom

Loose, cracked, or hollow-sounding tiles in the shower recess

Deteriorated or missing silicone sealant around shower base and screen

Soft or spongy floor near the shower

Common Causes

Failed or deteriorated waterproofing membrane beneath tiles
Cracked grout joints allowing water penetration
Deteriorated silicone sealant at wall-floor junctions and shower screen
Incorrect falls preventing water from draining to the waste
Movement cracks in the substrate transferring through to tiles
Original waterproofing not installed to AS 3740 standards
Age-related degradation — membranes in Perth homes over 15 years old are particularly vulnerable

What Happens If You Don't Fix This

•Timber subfloor rot requiring floor replacement ($5,000–$15,000)
•Structural framing damage in the wet area
•Mould growth creating health risks, especially in bedrooms below bathrooms
•Damage to adjacent rooms, wardrobes, and carpet
•Electrical hazard if water reaches wiring or downlights
•Significant decrease in property value if unaddressed

How This Is Fixed

Leak Detection & Diagnosis

A licensed waterproofer performs moisture testing and a flood test to identify exactly where water is escaping the shower recess. In Perth, this often involves testing the membrane condition and checking grout integrity.

Assess Repair Scope

Based on the diagnosis, the contractor determines whether a reseal, partial repair, or full strip-and-reline is required. Minor grout and silicone failures may only need resealing. Membrane failure requires a more comprehensive approach.

Preparation & Stripping

For membrane repairs, tiles are removed from the shower recess, the old membrane is stripped, and the substrate is cleaned and prepared. Any damaged framing or sheeting is replaced.

New Membrane Application

A new waterproofing membrane is applied in accordance with AS 3740-2021. This includes proper treatment of wall-floor junctions, hob areas, and waste penetrations. The membrane must pass a flood test before tiling.

Retiling & Finishing

New tiles are installed with flexible, waterproof grout. Silicone sealant is applied at all junctions. The shower is returned to service after appropriate curing time.

Cost Guide: Leaking Shower Repair Perth

Reseal Only

$800 – $1,500

Regrout and reseal the shower recess without removing tiles. Suitable when the membrane is intact but grout and silicone have failed.

Most Common

Partial Repair

$1,500 – $2,800

Remove floor tiles, repair or replace the membrane on the shower floor, and retile. Used when the wall membrane is still sound.

Full Strip & Reline

$2,800 – $4,500

Complete removal of all shower tiles, full membrane replacement on walls and floor, new tiles and fixtures. Required when the entire membrane has failed.

Perth-Specific Notes

Perth's sandy soils can cause subtle ground movement that stresses grout joints and shower membranes over time. Homes built during the 2000s–2010s construction boom in suburbs like Baldivis, Ellenbrook, and Butler are particularly prone to shower leaks due to the pace of construction during that period. The highest CPC for shower repair keywords in Perth ($5.00) reflects the strong demand for this service.

Prevention

Prevent future shower leaks with proper waterproofing installation that meets AS 3740-2021.

Learn about Shower Waterproofing

Licensed contractors only

WA Building Commission · Building Services (Registration) Act 2011

Leaking Shower Repair Perth FAQ

Common questions about this waterproofing issue in Perth

The most common signs are water stains on the ceiling of the room below, bubbling paint on adjacent walls, a persistent musty smell, or loose and hollow-sounding tiles. If you notice any of these, arrange a waterproofing inspection promptly — the longer you wait, the more extensive the damage becomes.

Sometimes, yes. If the waterproofing membrane beneath the tiles is intact and the leak is caused by failed grout or silicone, a professional reseal can resolve the issue for $800–$1,500. However, if the membrane itself has failed, tiles need to be removed for a proper repair.

Leaking shower repairs in Perth typically cost between $800 and $4,500 depending on the extent of damage. A simple reseal costs $800–$1,500, partial floor repairs run $1,500–$2,800, and a full strip-and-reline with new tiles costs $2,800–$4,500.

A reseal can be completed in 1–2 days. A partial repair typically takes 3–5 days including curing time. A full strip-and-reline usually takes 5–7 working days. Your contractor will provide a specific timeline based on the repair scope.

Most home insurance policies in Australia do not cover gradual water damage from a leaking shower, as it is considered a maintenance issue. However, if a sudden burst pipe caused the damage, that portion may be covered. Check your specific policy wording or contact your insurer.

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