Leaks and damp
Damp patches or drips on the ceiling below, water getting in around rooflights, and leaks at edges and walls.
Flat Roof Repair in Maidstone
Leaking extension, garage or dormer roof? Compare quotes from up to 3 vetted roofers in Maidstone for a flat roof repair or replacement.
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Flat roof problems we can help with
Wear and damage
Blistering, cracking or split felt, ponding water that won't drain, and moss or plants growing on the roof.
Replacement
New felt, EPDM rubber or GRP fibreglass roofs, with better insulation and new edge trims.
Flat roofs are common across Maidstone: on rear extensions behind Victorian and Edwardian terraces, on garages, porches and dormers, and on many post-war homes, such as those in Shepway and Park Wood. They're cheaper to build than pitched roofs, but they wear faster. Older felt roofs often last 10 to 20 years, while EPDM rubber and GRP fibreglass roofs usually last longer if they're well installed.
Many leaks come from the edges rather than the middle of the roof: the flashing where the roof meets a wall, the trims at the edge, or the seal around a rooflight. These can often be repaired. Ponding, where water sits on the roof for days after rain, is a sign the roof doesn't fall properly towards its gutter, and it shortens the life of any covering. Blistering, cracking or split felt across a large area usually means the covering is at the end of its life, and patching will only buy time.
If the roof needs replacing, ask about the material. Felt is usually cheapest. EPDM rubber is a single sheet with few joints. GRP fibreglass gives a hard, walkable finish, which is useful on a dormer or balcony. If the roof is over a heated room, such as an extension or dormer, replacing most of it normally means the insulation has to be brought up to current building regulations standards. Your roofer should explain how that will be done and whether building control needs to be told. Garage roofs over unheated space don't usually need this.
If your garage or extension was built before 2000, some older flat-roof sheets, garage roofs and soffits may contain asbestos cement. Don't drill, cut or break anything you're unsure about. Ask the roofer to check before work starts, and if they suspect asbestos, have it tested and follow the HSE's guidance.
When you post your job, include photos of the roof and of any damp inside, and say how big the roof is and how you get to it. Ask for a written quote that names the material, the guarantee, and whether rotten decking, edge trims and gutters are included. Reviews on Trade Pilot come from real, invoiced jobs, so you can see how other homeowners rated a roofer's work.
Typical prices
| Job | Typical UK range | Notes |
|---|---|---|
| Patch repair | £150–£400 | Small areas of split felt or a single leak |
| Reseal flashings or edge trims | £150–£350 | A common cause of leaks |
| Full replacement, per m² | £60–£120 | Felt is cheapest; EPDM rubber and GRP cost more |
| Single garage roof, full replacement | £900–£2,000 | Depends on the material and condition of the deck |
| Replace rotten decking | Varies | Only known once the old covering is lifted |
Typical UK ranges; your quotes depend on the job and access.
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Frequently Asked Questions
A patch repair usually costs £150 to £400. Full replacement is typically £60 to £120 per square metre, depending on the material, so a single garage roof often comes to £900 to £2,000.
A single leak or worn flashing can usually be repaired. If the covering is blistered, cracked or split across a large area, or water ponds on it, replacement is usually better value.
Felt is usually cheapest. EPDM is a single rubber sheet with few joints. GRP gives a hard, walkable finish. The best choice depends on the roof's size, shape, use and budget.
Older felt roofs often last 10 to 20 years. EPDM and GRP roofs usually last longer if they're well installed and maintained.
Possibly, if it was built before 2000. Don't disturb it yourself. Ask your roofer to check, and if asbestos is suspected, have it tested and follow the HSE's guidance before any work.
Replacing most of a flat roof over a heated room usually means improving the insulation to meet building regulations. Your roofer should explain how that's handled. Garage roofs over unheated space don't usually need this.
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