Asbestos in buildings is present in either loose, friable form (such as loose insulation material) or, more often, hidden within another material (such as asbestos cement products). Fibres might be visible in the friable form but are seldom seen in asbestos-cement and similar products. In both cases it is not possible to identify asbestos with certainty by visual examination alone and laboratory analysis is often required. Since March 2008 asbestos is effectively banned in South Africa, and it is unlikely to find asbestos containing materials in buildings constructed after that year. The golden rule is always: when in doubt assume the material contains asbestos!