Flat Roof Prices
How Much Does a Flat Roof Cost in the UK?
There's no single answer — and anyone quoting a flat roof price without seeing the roof is guessing. What your flat roof costs depends on:
- The covering — torch-on felt is the cheapest up front, EPDM rubber roofing lasts the longest, GRP fibreglass gives the hardest-wearing finish. Each is priced per m².
- The size and shape — a porch, a single garage and a full extension roof are very different jobs.
- What's underneath — a sound deck keeps costs down; rotten timber or an old covering that needs stripping adds labour and disposal.
- Insulation — building regulations often require an insulation upgrade when re-covering, which adds cost but cuts heating bills.
- Access and region — scaffolding needs and local labour rates both move the price.
That spread is exactly why comparing matters: the gap between the highest and lowest quote for the same flat roof is regularly up to 55%. The only way to know what your roof costs is to have local contractors price it — free and with no obligation.
Flat Roofing Questions, Answered
Should I repair or replace a leaking flat roof?
If the covering is under 10 years old and the leak is isolated, a professional repair is usually worthwhile. If the roof is older, has multiple leaks, blisters or standing water, replacement is usually cheaper over 10 years than repeated call-outs. A good contractor will tell you honestly which side of the line you're on — and with three quotes, you'll spot anyone pushing a replacement you don't need.
Which is best: EPDM rubber, GRP fibreglass or felt?
EPDM rubber roofing lasts longest (40–50 years) and suits most garages and extensions. GRP fibreglass gives a hard, seamless finish that handles foot traffic well but needs dry weather to install. Modern torch-on felt is the cheapest up front and fine for sheds and short-term fixes, but has the shortest life. Most of our contractors install all three and will recommend the right system for your roof.
Do I need building regulations approval for a new flat roof?
If you're replacing more than 25% of the roof covering, building regulations in England and Wales require the roof's insulation to be brought up to current standards at the same time. Your contractor handles this as part of the job — it's one of the things that separates a proper flat roofing company from a cheap patch merchant.
Could my old garage roof contain asbestos?
Corrugated grey cement sheets on garages built before 2000 often contain asbestos. Don't drill, break or remove them yourself — licensed contractors can remove and dispose of an asbestos garage roof safely and replace it with a modern flat roof.
How quickly can a local flat roofer start?
For urgent repairs, contractors can usually attend within days — sooner for active leaks. Full replacements are generally scheduled in depending on the contractor's workload and the season. Requesting quotes early, even if your time frame is "within 12 months", costs nothing and locks in prices that stay valid.
Compare Flat Roof Quotes Near You
