Old felt flat roofs crack, blister and pond water, and they're behind a large share of the leaks we're called out to. Modern GRP fibreglass and EPDM rubber roofs are seamless, last far longer and need almost no maintenance.
We replace flat roofs on kitchen extensions, garages, dormers and bay windows across Bristol, including new insulated warm-roof decks that meet Building Regulations and make the room underneath noticeably warmer.
01 What's included
- 01Old felt or covering stripped and removed
- 02Deck checked and replaced with new OSB3 boards where needed
- 03Insulated warm-roof option to current regulations
- 04GRP fibreglass or single-piece EPDM membrane
- 05New trims, drip edges and outlets
- 06Up to 15-year guarantee depending on the system
02 Signs your flat roof needs replacing
- Puddles that sit for days after rain
- Blisters, cracks or splits in the felt
- Damp patches on the ceiling below
- Moss or vegetation growing on the surface
- The roof is over 15 years old and has been patched before
Most garage and extension flat roofs are replaced in 1 to 3 days. The price depends on size, the system you choose and whether the deck needs replacing; it's all itemised in writing.
Get my fixed price03 Questions
GRP or EPDM, which is better?
Both are excellent. GRP is rigid and can be walked on, so it suits balconies and roofs you'll access. EPDM is a single flexible sheet with no joins, ideal for garages and extensions. We'll recommend one based on how the roof is used.
How long does a flat roof last?
A properly installed GRP or EPDM roof typically lasts 25 years or more, compared with 10 to 15 years for traditional felt.
Can you add insulation to my flat roof?
Yes. A warm-roof upgrade adds insulation boards on top of the deck. It's usually required by Building Regulations when the whole roof is replaced, and we handle the sign-off.
Roof repairs 
Fascias, soffits & guttering 
Velux & roof windows