Flat Roofs in Doncaster
Whether it's a garage, extension, dormer or commercial unit, we install flat roofs that actually stay watertight. Our preferred systems are GRP fibreglass and EPDM rubber — both high-performance, fully waterproof and fitted to manufacturer spec.
What you get
- ✓GRP fibreglass — A seamless, glass-reinforced finish — perfect for extensions and balconies.
- ✓EPDM rubber — A single-piece membrane with a 50-year material life expectancy.
- ✓Proper falls — We rebuild falls and decking where needed so water actually drains.
- ✓Trims & detailing — Aluminium drip trims, kerbs and upstands fitted to spec.
- ✓20-year guarantee — Workmanship covered, materials carry their own manufacturer warranty.
Most flat roof failures we attend are bad detailing, not bad materials. We get the detailing right first time.
Explore our full range
Flat Roofs FAQs
What is the best flat roof material in the UK?+
For most UK homes the best options are GRP fibreglass or EPDM rubber. GRP gives a seamless, hard-wearing finish and EPDM is a single-piece membrane with a 50-year material life. Both outlast traditional felt and resist UK weather extremely well.
How long does a flat roof last?+
A modern GRP flat roof typically lasts 25 to 30 years, while EPDM rubber roofs commonly last 40 to 50 years. Old-style mineral felt usually fails after 10 to 15 years. We only fit GRP and EPDM systems with our 20-year workmanship guarantee.
Why do flat roofs leak?+
Most flat roof leaks come from poor detailing — bad upstands, missing trims, or splits at junctions — not the membrane itself. Standing water from poor falls is the second most common cause. We rebuild falls and detailing properly so leaks don't return.