Roofer trimming the edge of a new EPDM rubber membrane on a double garage roof

Garage roofs: repair and replacement

Felt, EPDM rubber, GRP and pitched garage roofs, repaired or replaced by vetted local roofers at fair 2026 rates.

Quick answer: replacing a single garage roof costs £1,400 – £3,000 in 2026 depending on material, with repairs from £100 to £400. A double garage runs roughly 1.8 times the single price, and asbestos cement roofs cost £1,500 – £3,500 including licensed disposal.

Garage roof services cover everything from patching a split in the felt to stripping the whole roof and re-covering it in EPDM rubber or GRP fibreglass. Garage roofs are the most replaced roofs in the country: they were built cheaply in the first place and ignored until water starts dripping onto whatever is stored underneath. The good news is that they are also the simplest and cheapest roofs to put right.

Repair or replace?

If the covering is mid-life and the damage is local, a repair is the right call: a patch repair runs £100 – £300 and a timber or joist repair £150 – £400 each. Replacement wins once the felt is blistering or cracking across the whole surface, water is ponding, or you are back up the ladder every year. A failed covering usually means the deck boards underneath are absorbing water too, and a re-roof deals with both at once.

Garage roof replacement options

Felt (£1,400 – £2,000 single garage): the budget route, fine where upfront cost rules.
EPDM rubber (£1,600 – £2,600): the sweet spot for most garages. One seamless sheet at garage sizes, no flame during installation and a much longer life than felt.
GRP fibreglass (£1,900 – £3,000): the rigid, walkable option, worth its premium where the roof takes foot traffic or covers a workshop.
Pitched re-tile (£2,000 – £4,500): pitched garage roofs are simply small tiling jobs, re-tiled like the main house.

A double garage does not cost double: access is set up once and the crew is already there, which is where the roughly 1.8x rule comes from. Full price tables, including regional variation, are in our garage roof cost guide.

How a garage re-roof works

Most single garage re-roofs are done in a day, two at most. The old covering is stripped and the deck inspected, because rotten boards are the most common surprise on the job. Damaged boards and joists are replaced, the new deck or existing boards are prepared, and the new covering goes on: rolled and bonded for EPDM, laminated and top-coated for GRP, torched or bonded for felt. Edge trims, drips into the gutter and any junction with the house wall are finished last, and the waste is taken away.

Asbestos warning: if your garage was built before the 1990s and has corrugated grey cement sheets on top, treat them as asbestos cement until a test proves otherwise. Never break, drill, cut or pressure-wash the sheets, because damage is what releases the fibres. Removal must be handled by a licensed contractor with a waste consignment note, which is why asbestos garage roofs cost £1,500 – £3,500 including replacement. Read the asbestos roof guide before getting quotes.

Building regulations

A freestanding garage under 30m² is generally exempt from building regulations, which covers most single and many double garages. An attached garage counts as part of the house, so re-roofing it follows the same rules as the main roof. Whichever side of the line you are on, get the material, deck work and disposal itemised in writing, then compare two or three quotes against the fair rates in the cost guide.

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Garage roof FAQs

Garage roof questions, answered

Replacing a single garage roof costs £1,400 to £3,000 in 2026 depending on material: £1,400 to £2,000 in felt, £1,600 to £2,600 in EPDM rubber and £1,900 to £3,000 in GRP fibreglass. A double garage runs roughly 1.8 times the single garage price, and a pitched garage re-tile costs £2,000 to £4,500. See the garage roof cost guide for the full tables.

Yes, if the covering is mid-life and the damage is local. A patch repair costs £100 to £300 and a timber or joist repair £150 to £400 each. Once a felt roof is blistering or ponding across its whole surface, or you are patching it every year, replacement is the better spend because the deck underneath is usually deteriorating too.

EPDM rubber is the sweet spot for most garages: it costs a few hundred pounds more than felt, comes in one seamless sheet at garage sizes and needs no flame to install. Felt remains the budget route, and GRP fibreglass earns its premium where the roof takes foot traffic. Pitched garage roofs are re-tiled like any small pitched roof.

Corrugated grey cement sheets on a garage built before 1990 are likely to contain asbestos, as asbestos cement was the standard garage roofing of that era. Do not drill, break or pressure-wash it. The only way to be certain is a laboratory test on a sample, so have it tested before anyone touches the roof. The asbestos roof guide explains the safe route.

A detached garage under 30 square metres is usually exempt from building regulations, which covers most single and many double garages. An attached garage counts as part of the house, so re-roofing it follows the same rules as the main roof. When in doubt, a quick call to the local building control office settles it.