The Canadian government has set standards for acceptable levels of asbestos fibers in indoor air. A dangerous carcinogen, asbestos has the potential, when airborne, to cause serious health concerns including lung cancer and mesothelioma. Many common building materials used before 1975 contain asbestos. Some of these “asbestos containing materials” are floor and ceiling tiles, taping muds, insulation materials and pipe wrap. Asbestos can be difficult to identify by eye, as it has often been mixed with other materials commonly used in home and building environments. It is important, in order to minimize exposure risks, to have any potentially asbestos containing materials investigated and properly tested by an accredited laboratory.