Wet rooms: when they work
Understanding the benefits, limitations, and key pitfalls of wet room design.
At a glance
Quick Checklist
Key points at a glance
- 1Floor must be able to have a fall (gradient) built in
- 2Full tanking is essential, not optional
- 3Consider splash zones and glass panels
- 4Underfloor heating highly recommended
- 5Check building regs for timber floors
Questions to ask your installer
Take these to your next conversation with your fitter
- 1Is my floor structure suitable for a wet room?
- 2How will you create the fall to the drain?
- 3What tanking system will you use and is it guaranteed?
- 4Do I need building control sign-off for this work?
- 5How will the threshold work with the rest of the flooring?
- 6Can you show me previous wet room installations you've done?
💡 Tip: A good installer will welcome these questions. If they dismiss them, that's a red flag.
💡Myth vs Reality
Common Myth
"Wet rooms are cheaper because there's no shower tray"
The Reality
Proper tanking, screeding, and drainage usually costs more than a standard shower installation.
Common Myth
"You don't need a screen in a wet room"
The Reality
Without a screen, water sprays everywhere, making the room cold and requiring more heating.
What to look for
- •Proper tanking system covering the entire floor and lower walls
- •Gradient (fall) to the drain - typically 1:80 ratio
- •Glass panel or screen to control water spray
- •Non-slip floor tiles with appropriate R-rating
Common mistakes
- •Assuming any bathroom can become a wet room (floor construction matters)
- •Inadequate tanking leading to damp in rooms below
- •Insufficient fall to the drain causing pooling
- •Not installing underfloor heating - wet room floors feel cold
Quality considerations
- •Quality tanking systems come with manufacturer warranties
- •Linear drains look sleeker and are easier to create falls toward
- •Consider future mobility needs - wet rooms are accessible
- •Professional installation is essential - DIY wet rooms often fail
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This guide is written to help you make informed decisions, not to sell you anything. Always discuss your specific situation with a qualified installer.