Felt roof costs: repair and replacement prices
Real 2026 prices for patching, repairing and re-felting flat roofs, from sheds to garages, plus when EPDM is the smarter spend. Prices updated July 2026.
Felt is still the cheapest way to cover a flat roof, which is why it sits on millions of UK garages, sheds and extensions. It is also the shortest-lived flat roofing material, so the repair-or-replace question comes round more often than with anything else on the house. This guide covers the 2026 prices, what a proper felt system looks like, and when it is worth paying a little more for rubber instead. For a figure tailored to your own roof, use our roof cost calculator.
Felt roof costs (2026)
| Job | Typical cost |
|---|---|
| Patch repair | £100 – £300 |
| Re-felt per m² (torch-on, 3 layer) | £80 – £110 |
| Single garage (approx 18m²) | £1,400 – £2,000 |
| Shed roof, fitted | £250 – £500 |
| Shed roof, DIY materials | £100 – £300 |
These prices assume straightforward access and a sound deck. Rotten decking boards, upstands and complicated outlets add to the bill, which is why quotes for the same garage can vary. If your roof is on a garage specifically, the garage roof cost guide compares felt against every alternative.
How a proper 3-layer torch-on system is built
Good torch-on felt is a system, not a single sheet. A proper job lays three layers onto a sound deck: a vapour barrier first, to stop moisture from inside the building condensing within the roof; an underlay bonded over it, which provides the strength; and finally a mineral-finished cap sheet, whose granular surface protects the bitumen beneath from UV and weather. Each layer is torch-bonded to the one below with staggered joints. One-layer and two-layer jobs are cheaper and quoted often, but they are where the 10-year end of felt's lifespan comes from. Our roofing felt material guide covers the grades in detail, and a professional flat roofing installer should specify the full build-up in writing.
Repair or re-felt?
The pattern of the damage tells you the answer. One split, one blister or one lifted joint is a local injury: a £100 to £300 patch fixes it and the rest of the roof carries on. Bubbling, crazing or cracking spread across the surface is different: the bitumen itself has oxidised and gone brittle, and every patch you pay for simply moves the next failure a metre sideways. Once the surface is failing generally, put the money into a new covering instead. The failing felt roof guide shows what each symptom looks like and how urgent it is.
The EPDM question
Before you re-felt, price the alternative. On a single garage, EPDM rubber typically costs £200 to £600 more than a 3-layer felt system but lasts 2 to 3 times longer, with no seams to fail on most domestic sizes and no naked flame during installation. On cost per year of service, rubber usually wins. Felt keeps the advantage when the upfront budget is fixed, on short-life outbuildings, and on roofs you plan to replace anyway within a decade. See the EPDM rubber guide for the material itself and the flat roof cost guide for full pricing across felt, EPDM and GRP.
Get real prices for your felt roof
Up to three itemised quotes from vetted local roofers, checked against the fair rates on this page. Free, no obligation.