Only a lab test can tell you for sure. Your photo helps us send the right kit.
What is asbestos cement?
Asbestos cement is cement mixed with asbestos fibres, usually white asbestos (chrysotile), and pressed into sheets, pipes and other shapes. It was cheap, strong and weatherproof, so it was used widely across the UK until the late 1990s.
Where you'll find it
- Flat and corrugated sheets on sheds, garages and outbuildings
- Soffits and panels under the eaves
- Wall panels and partitions
- Gutters, downpipes and flue pipes
- Old cold water tanks in lofts
Some of these, soffits and panels especially, can be asbestos insulation board instead, which needs more care. That's one reason a photo helps. See our guide to asbestos insulation board.
What does it look like?
Much like any other cement: grey, hard and often weathered. Newer fibre cement, made without asbestos, looks almost the same. You can't be sure by eye. Only a lab can tell you.
Is it dangerous?
In good condition, it's a low risk. The fibres are bound tightly in the cement. Weathering, cracks and breakage can release fibres, and so can cutting, drilling, sanding or jet-washing it.
Leave it alone until you know what it is. If you're planning work that will disturb it, test it first.
How to test it
Send us a photo. If it's within reach and in fair condition, the kit's step-by-step guide shows you how to take a small sample from an edge. Never climb onto a cement roof to reach it.
- Send us a photoUse the free AI photo check. Snap the area, answer three quick taps, and see what's worth testing and how many samples you'd need.
- Take a small sampleThe kit comes with a proper mask, gloves, sample bags, a spray bottle, a step-by-step guide and a return envelope.
- Post it to the labYour sample is analysed by a UKAS-accredited laboratory.
- KnowYour result comes to you by email, in writing.
If it contains asbestos
If it's sound and won't be disturbed, you can usually leave it in place. If it's damaged, or you want it gone, use a professional asbestos removal contractor, and ask your local council how asbestos waste is handled where you live.
