Flat roof repair in the UK
Patching, resealing, or localised fixes on EPDM, felt, GRP, or single-ply flat roofs.
Typical UK cost range
£220–£1,400
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
Flat roof repair depends heavily on which system the existing covering is. EPDM rubber splits and punctures can be patched with a bonded EPDM patch and primer. GRP fibreglass hairline cracks need a local gel coat repair. Felt roofs with pooling water usually can’t be repaired in a way that lasts more than a year.
A good flat-roof repair starts with identifying the system and its age. On ageing felt, the honest answer is often “this needs replacing” rather than patching.
What changes the price
- Flat roof system — EPDM is cheapest to patch, GRP is middle, felt depends on age.
- Size of the affected area.
- Whether the deck underneath needs checking for water damage.
- Whether pooling water (standing puddles) is part of the picture — that’s a drainage issue, not a covering one.
Timeline: Usually same-day for a localised patch.
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
Is it worth repairing an old felt roof?
If the felt is 15+ years old and pooling water is visible, repair is a short-term patch at best. Honest roofers will quote a replacement at the same time as the repair and let you choose based on budget and timeline.
Can I repair a GRP flat roof myself?
For a small hairline crack, in theory yes — there are consumer-grade GRP repair kits. But GRP is sensitive to temperature and humidity during the cure, and a bad repair is worse than the original crack. I’d use a professional for anything bigger than a few centimetres.
Related guides
Independent rankings — no pay-to-rank. See Methodology, Complaints & corrections.