WaterproofingPerth

Shower Waterproofing Cost in Perth

Shower waterproofing is the most critical waterproofing application in any Perth home because the shower recess receives the most concentrated water exposure. Whether you are building a new shower, re...

Shower waterproofing is the most critical waterproofing application in any Perth home because the shower recess receives the most concentrated water exposure. Whether you are building a new shower, renovating an existing one, or repairing a leaking shower, the waterproofing must be done correctly to AS 3740-2021 standards. Costs vary depending on whether you need a simple reseal, a new membrane for a renovation, or a full strip-and-reline of a failed shower. We connect you with licensed Perth shower waterproofing specialists who get it right the first time.

Cost Breakdown

Reseal / Regrout

$800–$1,500

total

Professional resealing of grout joints and silicone in an existing shower. No tile removal required. Suitable when the membrane is intact but joints have deteriorated.

Most Common

New Shower Membrane

$1,500–$2,500

total

Full membrane application for a new or renovated shower recess. Includes floor and walls to the required height, hob treatment, flood test, and certificate.

Full Strip & Reline

$2,500–$3,500

total

Complete removal of existing tiles and membrane, substrate repair, new membrane system, flood test, and certification. Required when the existing membrane has failed.

Factors Affecting Cost

Shower Size & Type

A standard shower recess (900x900mm) is cheaper to waterproof than a large walk-in shower or curbless design. Curbless showers require more extensive membrane coverage and careful falls design.

Existing Condition

If the shower substrate has water damage, timber rot, or requires levelling, preparation costs increase significantly. Damaged sheeting or framing must be replaced before waterproofing.

Hob Design

Showers with a raised hob (step) are simpler to waterproof than hobless (curbless) designs, which require the membrane to extend further across the bathroom floor.

Niche & Seat Details

Built-in shower niches and seats add complexity to the waterproofing as they create additional junctions and corners that must be carefully detailed.

Perth-Specific Cost Notes

Shower waterproofing costs in Perth are comparable to other major Australian cities. The key Perth-specific consideration is that homes built during the 2005–2015 boom period may have shower waterproofing that was not installed to a high standard, leading to premature failure and the need for remedial resealing or relining sooner than expected.

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Related Guides

Bathroom Waterproofing CostLeaking Shower RepairShower Waterproofing Service
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Shower Waterproofing Cost Perth FAQ

Common questions about these waterproofing costs in Perth

Shower waterproofing in Perth costs $800–$3,500. A simple reseal costs $800–$1,500, a new membrane for renovation costs $1,500–$2,500, and a full strip-and-reline costs $2,500–$3,500.
While there is no legal prohibition on DIY waterproofing, it is strongly discouraged. In WA, waterproofing of wet areas must meet AS 3740-2021, and a waterproofing certificate must be issued by a licensed contractor for building approval. DIY work cannot be certified and may void your insurance.
A shower reseal takes 1–2 days. New membrane application takes 2–3 days including curing and flood testing. A full strip-and-reline takes 4–7 working days including tile removal, membrane curing, and retiling.
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