Roofers: What They Do and What to Check
New roofs, repairs and flat roofs — plus the extras that catch quotes out.
4 min read · Updated 2026
Key takeaways
- ›Always check whether scaffolding, skip and felt are included.
- ›Flat roofs should use GRP fibreglass or EPDM, not old felt.
- ›Ask for a written workmanship guarantee of at least 10 years.
What a roofer does
Roofers strip, repair and renew pitched and flat roofs, fix leaks, replace flashing, repoint chimneys and fit roofline (fascias, soffits and gutters). A full re-roof includes new felt or breathable membrane, battens, tiles or slates, and flashings. Flat roofers renew torch-on felt, GRP fibreglass or EPDM rubber membranes.
Typical prices (UK 2026)
- •Re-roof a 3-bed semi: £5,000–£9,000.
- •Flat roof replacement: £1,500–£4,000.
- •Repair a slipped tile / small leak: £150–£400.
- •Chimney repoint: £500–£1,500.
- •New gutters and downpipes (semi): £600–£1,400.
Questions to ask and common mistakes
Common mistakes: accepting a quote without scaffolding and skip, re-roofing over old rotten battens, and using cheap bitumen felt on a flat roof that will fail in a few years. Ask exactly what membrane and tile are included and get the guarantee in writing.
- ☐Does the quote include scaffolding, skip and waste?
- ☐Are you replacing the felt/breathable membrane and battens?
- ☐What membrane and tile/slate are included?
- ☐What workmanship guarantee do you provide (in writing)?
Frequently asked
Can a roof be patched instead of replaced?
Often yes for isolated slipped tiles or a small flashing leak. A roofer should advise; some push a full re-roof when a repair would do, so get a second opinion.
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