Service
Flat Roof Replacement Cost
Real 2026 prices for replacing a flat roof in Buckinghamshire — by material, per m², with no hidden extras.
- EPDM rubber pricing per m²
- GRP fibreglass per m²
- High-performance felt per m²
- Insulation upgrade costs
- Edge & lead detailing included
- Disposal & scaffold itemised
Typical 2026 prices
Per-square-metre fitted prices for a standard single-storey extension or garage roof, including strip, new deck if required, insulation to current regs, and edge trims.
- ▸EPDM rubber: £85 – £115/m²
- ▸GRP fibreglass: £100 – £135/m²
- ▸Torch-on felt (3-layer): £75 – £95/m²
- ▸Add £600–£1,400 for scaffold on awkward access
- ▸Add £150–£300 for new lead apron to house wall
A worked example
Typical 4m × 5m (20m²) extension flat roof, EPDM, full strip and replace with new insulation: usually lands £1,900–£2,500 all-in including VAT and a lead apron up to the house. We'll quote the exact figure after a quick site visit.
FAQs
Why are some EPDM quotes much cheaper?+
Usually no insulation, no edge trims (just folded over), or single-ply 1.2mm membrane instead of 1.5mm. Read the spec, not just the price.
Do I need building regs sign-off?+
If we're upgrading insulation as part of a flat roof replacement (which is now standard), then yes — we handle the building control side.
Related reading
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Need Roofing Work You Can Rely On?
Speak with Butler Bespoke Roofing for honest advice, a free site visit and a clear, written quote anywhere across Buckinghamshire.