Asbestos is a naturally occurring mineral that was commonly used in construction materials between the 1950s and 1990s. It was used for its heat-resistant properties and its ability to strengthen materials. However, it has since been found to pose serious health risks to humans, including lung cancer, mesothelioma, and asbestosis.

The dangerous properties of asbestos were not fully understood until the 1970s, and many buildings constructed before that time may contain materials that contain asbestos. It is estimated that over 50% of buildings in the UK may contain asbestos materials.