Cost your wet-room tile repair.

Wet-room tile repair sits in an awkward bracket: the work is small but the consequences of getting it wrong are big, because every tile in a wet room is part of the waterproof envelope. Typical repair costs in the UK range from £150–£500 for a simple cracked tile or regrout, up to £1,500–£4,000 for partial re-tiling that disturbs the tanking membrane underneath.

The single most important question before any repair: does the tanking under the tile need to come up? If yes, the job is essentially a partial wet-room rebuild. If no, it's a tiler-day job.

Common wet-room tile problems

• Cracked tile — usually from a dropped object or floor movement. Surface crack only? Easy. Crack through to the tanking? Harder.
• Failed grout — discoloured, missing or crumbling grout lines, particularly around the drain and lower wall corner. The tile is fine but the gap between tiles is no longer waterproof.
• Failed silicone — black mould or peeling silicone in the floor-to-wall corners. Almost always cosmetic but can hide leaks underneath.
• Loose tile (drum sound when tapped) — adhesion has failed. If only one or two tiles, easy. If a whole area, the substrate may have moved.
• Water damage on the ceiling below — a real problem. The tile/grout isn't sealing properly and water is reaching the floor structure.

Typical UK costs

The tanking question

When a tile is cracked through, you have to decide: are you confident the tanking underneath is still intact? If the tile was hit by something hard and the tanking membrane was scored, water can sit between the tile and tanking and migrate sideways for months before showing on the ceiling below.

A good wet-room specialist will lift the tile, inspect the membrane (pressure-test if needed), and re-tank locally before retiling. Cutting corners here is what causes most wet-room leak callbacks.

Matching tiles

If your wet room is more than 3–4 years old, the original tile batch is probably out of stock. Three options:

• Re-tile a defined zone — match by aesthetic transition (whole wall, whole shower zone) so the colour/batch difference reads as deliberate.
• Use a leftover spare tile — many tilers leave a small reserve at install time; check the cupboard or attic before assuming you need new stock.
• Source from a tile-matching specialist — companies like Tile Match or similar can sometimes track down legacy batches; expect a premium and longer lead times.

Things people often miss

• Grout colour — UK water is mostly hard, and grout discolours over 5–10 years even when sealed. Fresh grout is brighter than aged grout; consider regrouting whole walls/floor rather than patches.
• Silicone vs grout in corners — corners must be siliconed, not grouted. Grout cracks under wall movement; silicone flexes. If your wet-room corners are grouted, that's the failure point.
• Drain seal — most wet-room leaks aren't through the tile but through the perimeter seal of the drain or gully. A proper repair lifts the drain cover and reseals the membrane junction.
• Subfloor issues — chipboard or particleboard substrates can swell when wet. If the floor feels spongy or you see ceiling damage below, the substrate may need replacing as part of any tile repair.

Frequently asked questions

Want a local pro to handle this? A wet-room tile specialist will inspect properly, give you an honest call on whether you need a regrout, a localised re-tile, or full re-tanking, and do the job with the right materials. The wrong materials in a wet room cost far more in the long run than the right ones.