Roof leak / damp patch in the UK
Finding the actual source of a leak and fixing the cause, not just the stain.
Typical UK cost range
£200–£1,800
National baseline. City-specific ranges are adjusted for local labour and access costs on the city pages below. See the full UK cost guide for the methodology and the factors that move a quote.
What the job involves
Roof leaks are harder to diagnose than they look because water runs along battens and drops onto the ceiling a metre or more from the entry point. A good leak repair starts in the loft with a torch and moisture meter, traces the water back to the source, then fixes the cause — usually a flashing, a popped nail, a slipped tile, a pipe boot, or a valley.
Patching the visible stain without finding the source is a placebo. Within a season the leak reappears, often in a different room.
What changes the price
- Whether the leak source is obvious or requires an investigation stage.
- Scaffold or cherry picker access for two-storey and above jobs.
- Whether remedial work (rotten battens, failed underlayment) is needed around the source.
- Specialist materials — lead for flashings, specific tile profiles, skylight seals.
Timeline: Diagnosis and basic fix usually complete in a day; larger issues (valley or flashing replacement) may run to 2–3 days.
Pick a city for local pricing
Each city page has adjusted cost ranges, local context, and the roofers in our directory that cover it.
Major English cities
Other English cities
Northern Ireland
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Start my quote requestCommon questions
Why does my ceiling stain appear far from the leak?
Water enters the roof, runs along a rafter or batten until it meets a low point, then drops onto the ceiling. The entry and exit points can be a metre or more apart, which is why a ground-up diagnosis matters.
Will a leak repair stop the damp patch from coming back?
If the true source is fixed and the ceiling has time to dry fully, the damp patch will usually dry out within 2–6 weeks. If it reappears after drying, the root cause was not the one that got fixed — call the roofer back.
Related guides
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