How Much Does a Flat Roof Repair Cost in 2026? (UK)
A flat roof repair in the UK costs roughly £150–£600 for a small patch, leak or flashing repair in 2026 — or £1,000–£2,500 to re-felt a small flat roof such as a garage or extension. A full replacement runs £80–£130 per m² depending on whether you choose felt, EPDM rubber or GRP fibreglass. The big cost drivers are the type of damage, roof size, covering material and access. This guide breaks down every line of the price and where you can safely save.
Flat Roof Repair Cost by Job (2026)
Typical supplied-and-fitted prices on a standard single-storey flat roof with reasonable access.
Rule of thumb in 2026: a quick repair pays off if the roof is otherwise sound, but if the covering is past 15–20 years old or patched repeatedly, a full re-cover usually works out cheaper per year of life.
Where the Money Goes
- Inspection & diagnosis (£0–£150). Many roofers fold this into the quote, but a leak trace on a complex roof can be charged separately.
- Materials (£10–£40/m²). Felt is cheapest; EPDM rubber and GRP fibreglass cost more but last far longer and resist ponding water better.
- Labour (£200–£300/day). A two-person team can patch or re-felt a small roof in a day; a full strip and re-cover takes longer.
- Access & scaffolding (£0–£800). Ground-floor roofs need little; a first-floor or hard-to-reach roof may need a tower or scaffold.
- Stripping & disposal (£100–£400). Removing old felt and decking and skip hire for a full replacement.
- Decking & insulation (extra). Rotten timber decking or upgrading to a warm-roof build-up adds to a full replacement.
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