The short answer
HSE guidance puts careful lifting of cement sheets in the non-licensed category, so the law does not simply forbid a diy attempt. The danger is in the method: sheets that crack, drill or crumble release fibres. Disposal is the other hurdle, since the waste cannot go in an ordinary skip. For most owners, a survey and a professional removal are the safer route.
What the guidance actually says
The HSE's non-licensed work page covers cement roof sheets that are lifted off with care and not broken. If the sheets are to be badly broken up, throwing off heavy dust and rubble, the work becomes notifiable, though still non-licensed. That is the distinction that matters, and it is about method rather than who holds the spanner.
This is not legal advice, and the duties that apply to an employer or a contractor are not the same as those on a householder working on their own property. Anything you read here is a starting point. Read the HSE's pages on asbestos, and speak to B&NES, or the authority for your own area, about disposal before you plan the work.
The practical lesson is that the law leaves room for a careful owner but gives no comfort to a careless one. A roof that is already cracked, mossy and brittle is exactly the kind where the careful method is hardest to follow.
Why the method is the risk
Asbestos cement holds its fibres locked in the set cement. While a sheet is whole and left alone, those fibres stay put. The risk begins once a sheet is cut, drilled, snapped, scrubbed or smashed, because that frees fine fibres into the air where they can be breathed in, and the harm shows up years later.
Old roof sheets are not forgiving. Decades of weather leave them brittle, the bolts through them corrode into the cement, and a sheet that looked solid will crack when the fixing is turned or when someone steps near the edge. Moss and lichen make the surface slippery as well, and a fall through a brittle roof is a danger of its own, entirely apart from fibres.
This is why a few rules appear in every careful account: wet the sheets down, unbolt rather than break, lower them whole, wrap them straight away, and keep the work away from anyone not involved. Each rule exists to prevent fibres being released, and each is much easier to follow with the right equipment and practice.
What a careful job involves
A proper job starts well before anyone touches a bolt. The material is confirmed by a test, the area is cleared of people and pets, a working platform goes up so that nobody walks on the sheets, and suitable protective equipment is worn. Then the fixings are undone in a way that avoids snapping the sheet, each one is lowered whole and wrapped, and the debris on the ground is dealt with without dry sweeping.
- Testing first. Do not treat the sheets as asbestos or not asbestos on a guess. Our page on how to tell explains the clues and the test.
- Access without weight. Roof ladders, crawl boards or an access platform spread the load. Standing on aged sheets is how people go through them.
- No power tools. No drilling, grinding, sanding or pressure washing, because all of them free fibres.
- Wrap and label. Whole sheets go into heavy-duty sheeting or bags as they come down, sealed and marked.
Done well, a single small garage can be stripped without a sheet breaking. Done badly, one dropped sheet contaminates the garden, the neighbour's side and the clothing of everyone nearby.
Where the waste goes
Even a perfect removal leaves you with asbestos waste, and that is where many owners hit a wall. It cannot go in an ordinary skip, and it should not be taken to the tip in the back of the car without finding out what your local site accepts. Many household waste sites have rules about quantities, wrapping and booking in advance, and some do not take it at all. These rules differ between councils, so get an answer from B&NES or the council that covers you before the first sheet comes down.
MyBuilder's 2026 asbestos removal guide puts typical UK removal at about £2,000 on average, with general removal at about £50 per square metre. Part of what you pay a professional for is the wrapping, transport and disposal, and the paperwork that goes with it. Our page on the cost of asbestos garage roof removal breaks down what sits behind those averages.
Weighing a diy job against hiring it out
The honest comparison is not just cost. A small, sound, intact roof with easy access and a clear disposal route is the case where a careful owner has the best chance. A roof with cracks, heavy growth, no safe access or sheets that are part of a connected structure is the case to leave to a team with the equipment and the disposal arrangements.
Think about insurance too. If something goes wrong during a do-it-yourself removal, your home policy may have views on it, so read the wording before you begin. Our page on garage roof insurance covers how these roofs are treated in claims.
If you do decide to hand the work over, the sensible sequence is a survey, a written fixed price that lists removal and disposal separately, and a clear plan for the new roof. We do the survey at no charge, take photographs on the day, and write the fixed price down afterwards. Work that goes ahead is covered by our ten-year written guarantee on workmanship. If you also plan to change the shape of the garage roof, our note on flat to pitched garage roofs is worth a read, and the full range of work is under garage roof replacement.
