Asbestos is a naturally occurring, strong mineral fibre that is resistant to heat and many chemicals. It differs from other minerals because of its fibrous, crystalline structure. These properties have made asbestos a very favorable building material which was widely used prior to about 1975. Intact and undisturbed asbestos containing material presents no risk of exposure. It is only when the material is damaged or is in a very friable (easily crumbled) form that fibres may become airborne and there is a potential for exposure.
Additional information pertaining to asbestos can be found in the right-hand column.