Asbestos is a durable inexpensive mineral fibre used to make cement pipes, wallboard, siding, roofing, flooring, plaster, insulation, fireproofing material, ductwork, and adhesives. All forms of asbestos are carcinogenic and there is no safe level of exposure. If asbestos fibres are inhaled, it can lead to crippling and fatal diseases including several types of cancer and asbestosis.