Flat roofing
EPDM rubber, GRP fibreglass and felt compared, with typical UK costs. Ask for a quote and we pass your enquiry to a flat roofing specialist.
EVERY ROOF IS DIFFERENTQuick answer: published UK cost guides put a standard flat roof replacement at about £2,800 to £7,500. Per square metre, felt is roughly £50 to £80, EPDM rubber £80 to £100 and GRP fibreglass £95 to £120. Typical ranges, last reviewed September 2026; your quote depends on size, access and the state of the deck underneath.
Flat roof systems compared
Typical lifespans and costs per square metre
EPDM Rubber Roofing
A synthetic rubber membrane, often laid as a single sheet. Durable and weather resistant.
Lifespan
30+ years
Cost
£80-£100/m²
- Excellent waterproofing
- UV resistant
- Flexible in cold weather
- Low maintenance
GRP Fibreglass Roofing
A fibreglass system laid in place to form a seamless, hard surface. Often used where people walk on the roof.
Lifespan
Up to about 30 years
Cost
£95-£120/m²
- Seamless finish
- Hard, walkable surface
- Low maintenance
- Range of colours
Felt Roofing
Bitumen felt, now usually torch-on layers. A lower-cost option for garages, sheds and extensions.
Lifespan
15-20 years
Cost
£50-£80/m²
- Most affordable
- Quick installation
- Easy repairs
- Widely available
Flat roof work you can ask about
New Installations
Complete flat roof installations for extensions, garages, and outbuildings.
Replacements
Upgrade old felt roofs to modern EPDM or GRP systems.
Repairs
Fix leaks, blistering, ponding, and other flat roof issues.
Inspections
A check of the membrane, edges and drainage to spot problems early.
Flat Roofing FAQs
Ask for a flat roof quote
Tell us about the job and we'll find up to 3 local flat roofers who cover your area and ask them to contact you with a quote. Free, no obligation.