Tile Grout Repair Cost (2026 UK Guide)
Damaged or mouldy grout can allow water to penetrate behind tiles, leading to damp, loose tiles and structural damage. While small regrouting jobs are affordable, widespread failure may require more extensive repairs.
This 2026 UK guide explains average tile grout repair costs in the UK, what affects pricing, and when urgent action is required.
Average Tile Grout Repair Cost
| Issue | Repair required | Average UK cost |
|---|---|---|
| Small area regrouting | Remove and replace grout | £150 – £400 |
| Full shower regrouting | Strip and regrout enclosure | £300 – £800 |
| Kitchen splashback regrouting | Remove and replace grout | £150 – £350 |
| Mould treatment and reseal | Clean and apply sealant | £100 – £250 |
| Tile resealing | Apply waterproof seal | £120 – £300 |
| Replace loose tiles and regrout | Refix tiles and grout | £250 – £700 |
For a full overview of related repairs, see our Kitchen & Bathroom Repair Cost Guide.
What Causes Grout Damage?
Grout is exposed to constant moisture and cleaning products.
Common causes include:
- Water penetration
- Poor ventilation
- Age-related cracking
- Harsh cleaning chemicals
- Movement in walls or floors
- Inadequate waterproofing
Bathrooms are particularly prone to grout deterioration due to humidity.
Signs Your Grout Needs Repair
Early repair prevents tile and wall damage.
Look out for:
- Cracked or crumbling grout lines
- Black mould growth
- Loose or rocking tiles
- Damp smell near tiled areas
- Water leaking through joints
- Discolouration along seams
If tiles begin to loosen, water may be affecting the backing board.
What Affects Tile Grout Repair Costs?
Several factors influence pricing.
Area size
Small patch repairs are inexpensive.
Full shower or bathroom regrouting costs more.
Tile type
Large format tiles require more precise grout work.
Extent of moisture damage
If backing boards are damaged, additional repairs increase costs.
Sealant condition
Old silicone may also need replacing.
DIY checks you can safely do
- Inspect grout lines for cracks
- Check for mould growth
- Monitor loose tiles
- Improve ventilation in bathroom
- Take photos before requesting quotes
Avoid regrouting over damaged or damp surfaces.
When this is an emergency
- Water is leaking behind tiles
- Tiles are detaching from walls
- Damp is spreading to adjacent rooms
- Mould growth is severe
- Subfloor damage is suspected
Urgent repair may prevent structural issues.
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