Why one job beats two
Taking an asbestos roof off is a specialist task and putting a new roof on is a roofing task. Hiring them separately means two quotes, two sets of dates and a garage open to the Manchester weather in between. Doing both as one job keeps the garage uncovered for as little time as possible, usually a day or two for a single garage.
It also avoids the common trap of a removal-only contractor leaving bare timbers and no clear idea who should fit the new roof or what to ask them for.
How the job normally runs
The photos are reviewed first. Corrugated cement sheeting on a garage built before 2000 is normally treated as asbestos, and a small sample is only taken if there is real doubt. If it is treated as asbestos, the contractor plans the work: how the sheets come off whole, how they are wrapped, and where the waste goes.
The sheets are lifted off in one piece where possible, wrapped, labelled and taken away as hazardous waste under a consignment note. The timbers are then checked and repaired, and the new roof is fitted.
What goes on the new roof
Most owners choose pre-coated steel box profile sheeting. It is light enough for old garage timbers, does not need painting and comes in a few colours. Insulated or anti-condensation backed sheets suit a garage used as a workshop or for storing things that dislike damp.
Other options are cement-free fibre sheets, bitumen corrugated sheets, a rubber EPDM system or a flat roof system on a low-pitched garage. If you may want solar panels later, ask for a roof that can carry them. Our roof options guide compares each choice.
What it costs
UK firms commonly quote in the region of £2,000 to £3,500 for removing and replacing the roof of a single garage, and more for a double garage. The final price depends on size, access in your lane or drive, the condition of the timbers and the roof you choose. Nothing is final until the roof has been confirmed and the job inspected.
Common questions
How long does removal and a new roof take?
A single garage is usually a day or two on site once the work is booked and the roof has been confirmed. Larger garages, poor timbers or bad weather can add time.
Do I need planning permission for a new garage roof?
Replacing a roof like for like on an existing garage usually does not need planning permission, but raising the height or changing the shape can. Check with your local council first.
Can the new roof go straight over the old asbestos sheets?
It is sometimes done (overroofing) but it leaves the asbestos in place and the fixings can disturb it. Taking the old roof off is the more common choice when replacing. Ask any contractor which method they propose and why.