Flat roof repairs and replacements across Maidstone — GRP fibreglass, EPDM rubber and felt systems. Extensions, garages, bay windows and outbuildings. Free quotes, 10-year guarantee.
Flat roofing in Maidstone costs £800–£6,000 depending on size and system, with GRP fibreglass and EPDM rubber the main choices at £80–£120 per square metre. Both outlast felt by decades and carry our workmanship guarantee. Call 0162 229 6232 for a free flat roof survey.
Flat roofs are common across Maidstone's housing stock — on rear kitchen and living room extensions, on detached garages, on bay window tops, and on first-floor flat-roofed additions. The Medway valley's steady annual rainfall and occasional frost make flat roof maintenance particularly important. A poorly installed or ageing flat roof collects standing water, which accelerates felt deterioration and causes structural water ingress into the property below.
GRP fibreglass is now the preferred solution for most flat roofs in Maidstone. It's seamless, highly durable (25+ year lifespan), and resistant to the foot traffic common on accessible flat roofs. We install GRP on extensions, garages and bay tops across Maidstone and the surrounding Kent area. It can be overlaid on existing substrates in many cases, reducing replacement cost.
EPDM single-ply rubber is an excellent alternative to felt on larger flat roof areas. Its flexibility handles thermal movement well — particularly important on Maidstone properties where south-facing roofs experience significant summer heat gain. We specify EPDM for flat roofs over 30 square metres where its cost-to-longevity ratio outperforms felt.
High-performance felt (torch-on or cold-applied) remains a cost-effective option for smaller flat roof areas and garages. We use only high-performance underlays and cap sheets — not the budget felt that fails in 5–8 years. Properly installed felt should last 15–20 years in the Maidstone climate.
Typical cost: £800 – £6,000 — depending on size and system. Average kitchen extension (20–30 sq m) typically £1,200–£2,500 in GRP.
We moisture-test and probe the existing deck at your Maidstone property to establish whether a recover is viable or a full strip is needed.
You receive a written quote naming the system, insulation, drainage falls and outlet detail.
We install the GRP or EPDM system with correct edge terminations, outlet integration and designed drainage falls.
We test the drainage, hand over the specification record, and back the work with our workmanship guarantee. Call 0162 229 6232.
Flat roofing in Maidstone costs £800-£6,000 depending on size and system. See our flat roof cost page for GRP and EPDM prices per square metre and the deck question that decides half the price.
See full pricing →“GRP fibreglass flat roof on our rear extension in Loose. Previous felt roof had lasted 12 years and was failing badly. The GRP installation was neat, fast and came with a 10-year guarantee. Very happy.”
“Garage flat roof replacement in Aylesford — EPDM over a large double garage. Finished in a day, totally waterproof, and the price was very fair for the size of the job.”
“Bay window flat roof leaking into the front bedroom on our Edwardian semi in Bearsted. Stripped and re-done in GRP in one day. No leaks since and the finish looks great.”
For most domestic applications in Maidstone, GRP fibreglass is our first recommendation. It's seamless, durable, and performs well in the Medway valley's wet climate. EPDM is better suited to larger areas. We'll advise on the best system for your specific roof after a free survey.
GRP fibreglass typically lasts 25+ years. EPDM 20–30 years. High-performance felt 15–20 years. All our flat roof installations carry a 10-year workmanship guarantee.
Yes, if the substrate is sound. We assess the condition of the existing roof deck before recommending repair or replacement. Many Maidstone extensions have flat roofs where the deck is still good but the felt covering has failed — in these cases a recover (applying new membrane over existing) is possible without full strip-out.
Replacing a flat roof like-for-like doesn't require planning permission. Converting a pitched roof to flat, or significantly altering the roof height, may require consent. Conservation area properties in Maidstone may have restrictions. We'll advise before quoting.
Only if the deck is sound and dry. We probe and moisture-test every deck at survey, because a new covering over a wet deck fails within a few years.
Yes. Where the fall is inadequate we specify a tapered insulation system to create the correct gradient, which removes the ponding permanently rather than just re-covering over it.
No. Surveys and written quotes across Maidstone are free with no obligation, and we provide a written report of the roof condition either way.
We cover Maidstone and the surrounding area. Click your location for specific local information.
No call-out fees. No obligation. Honest pricing from a local Maidstone roofer.
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