Asbestos Cement Corrugated Sheet
Corrugated roofing and cladding sheets made with chrysotile asbestos fibres bound in Portland cement.
Description
Asbestos cement corrugated sheeting is one of the most common asbestos-containing materials found in buildings worldwide. Manufactured by mixing chrysotile (white) asbestos fibres — typically 10 to 15 per cent by weight — with Portland cement and water, the resulting sheets were pressed into a corrugated profile and cured to produce a lightweight, weatherproof, and fire-resistant building product.
Production began in the early 1920s and scaled rapidly through the post-war construction boom. By the 1950s and 1960s, corrugated asbestos cement sheets had become the default roofing and wall-cladding material for agricultural buildings, factories, warehouses, garages, and even some residential extensions. Their low cost, ease of installation, and excellent fire performance made them an attractive alternative to metal or slate.
The asbestos fibres within the cement matrix serve as reinforcement, giving the sheet tensile strength while keeping it thin and light. In good condition, the fibres are tightly bound and present a relatively low risk. However, as the material ages, weathering, moss growth, acid rain, and physical damage cause the cement to erode, exposing fibres at the surface. Drilling, cutting, breaking, or pressure-washing these sheets can release respirable asbestos fibres into the air, creating a serious health hazard.
Exposure to airborne asbestos fibres is linked to mesothelioma, asbestosis, and lung cancer. Even brief, high-intensity exposure — such as snapping a sheet during demolition — can be dangerous. For this reason, most countries now regulate or ban the manufacture and installation of asbestos cement products, though vast quantities remain on existing structures.
If you suspect corrugated sheeting on your property contains asbestos, do not disturb it. Engage a licensed asbestos surveyor to take samples and, if removal is necessary, use an accredited asbestos removal contractor who can safely handle, transport, and dispose of the material at a licensed waste facility.
Countries where commonly found
Commercial brands
How to identify
Asbestos cement corrugated sheets are typically grey in colour and have a uniform, finely textured surface. They are heavier and more brittle than modern fibre-cement alternatives. Look for a slightly rough or chalky surface, especially on weathered sections. Older sheets may show layering at broken edges, and fine white or grey fibres may be visible under magnification. The sheets usually measure about 6 mm thick and produce a dull thud rather than a metallic ring when tapped.
Health risk & friability
This material has a risk level of 2 out of 5.
It is classified as non-friable, meaning the asbestos fibers are tightly bound within the material matrix. When in good condition and left undisturbed, the risk of fiber release is low. However, cutting, drilling, sanding or breaking the material can release dangerous fibers.
What to do if you find this material
Do not drill, cut, sand, or pressure-wash the sheets. If the material is in good condition and undamaged, it may be safe to leave in place and manage through regular inspection. If it is deteriorating or you plan building work that would disturb it, commission a professional asbestos survey. Only a licensed asbestos removal contractor should remove and dispose of the material, following local regulations for double-bagging and disposal at a licensed landfill.
Frequently asked questions
How can I tell if my corrugated roof sheets contain asbestos?
Is asbestos cement corrugated sheeting dangerous?
Can I remove asbestos corrugated sheets myself?
How much does it cost to remove asbestos corrugated sheeting?
What should I replace asbestos corrugated sheets with?
Related materials
Other asbestos-containing materials you might encounter.
Asbestos Cement Flat Sheet
Flat pressed sheets of asbestos-reinforced cement used for cladding, soffits, and interior partitions.
Asbestos Roofing Felt
Bituminous roofing felt reinforced with an asbestos fibre mat, used on flat and low-pitch roofs.
Asbestos Ridge Tile
Moulded asbestos cement ridge capping tiles used to seal the apex of pitched roofs.
Asbestos Cement Pipe
Pressure and drainage pipes made from asbestos-reinforced cement, widely used for water mains and sewers.
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