A flat roof replacement in Maidstone costs between £900 and £4,000 for most domestic applications. GRP fibreglass on a standard kitchen extension (25 sq m) typically costs £1,900–£2,500. EPDM rubber is slightly cheaper at £1,700–£2,200. High-performance felt: £1,400–£1,900. All prices include stripping existing covering, deck inspection and 10-year workmanship guarantee.
| System | Small 15m² | Medium 25m² | Large 40m² |
|---|---|---|---|
| GRP fibreglass | £1,200–£1,600 | £1,900–£2,500 | £3,000–£4,000 |
| EPDM rubber | £1,100–£1,400 | £1,700–£2,200 | £2,700–£3,500 |
| High-performance felt | £900–£1,200 | £1,400–£1,900 | £2,200–£3,000 |
For most Maidstone domestic extensions we recommend GRP — seamless, 25–40 year service life, no maintenance. See our flat roofing page and cost guide.
No call-out fees. No obligation. Honest pricing from a local Kent roofer.
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