Water Seeping Behind Tiles
Signs of water getting behind wall tiles, such as damp patches on the other side of the wall or loose tiles.
What Is Causing This?
- 1Cracked or missing grout allowing water through
- 2No waterproof membrane behind tiles in wet areas
- 3Failed silicone sealant at junctions between tiles and bath or tray
How Urgent Is This?
This needs prompt attention. Delaying could cause further damage, safety risks, or significantly higher repair costs.
What Needs to Be Done
A tiler will remove the affected area, dry out and replace any damaged substrate, install a waterproof membrane, and re-tile with proper grout and sealant.
How Much Will It Cost?
National average estimate
Labour: £233 – £688 | Materials: £113 – £475
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Prices are estimates based on typical UK rates. Actual costs depend on the specific issue, accessibility, and your location. All quotes from tradespeople on Tradesfolk are completely free.
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Try Snap and FixHow to Prevent This
Replace silicone sealant around baths and shower trays every 2 to 3 years. Regrout before grout becomes cracked or porous. Use tanking in all wet areas.
Related Problems
Tiles in the shower enclosure loosening, bulging, or falling off the wall, often with damp behind them.
Water escaping from beneath the shower tray, appearing as damp on the ceiling below or on the floor outside the shower.
Grout between tiles turning dark grey, black, or developing visible mould spots, especially in wet areas.
Other Tiler Problems
A crack running through one or more wall or floor tiles in the bathroom, sometimes with pieces missing.
One or more floor tiles that rock, click, or move underfoot, sometimes with hollow sounds when tapped.
Grout between tiles turning dark grey, black, or developing visible mould spots, especially in wet areas.
Floor tiles tenting upward or popping off the substrate, sometimes with a cracking sound.