Asbestos is a naturally occurring mineral that was widely used in construction, insulation and fireproofing materials during the 19th and 20th centuries. It was valued for its heat-resistant properties and versatility. However, it was later discovered that asbestos is a highly hazardous substance that can cause serious health problems, such as lung cancer, mesothelioma and asbestosis.

Asbestos can be found in many different materials, such as asbestos cement, insulation board, floor tiles, pipe lagging, and sprayed coating on walls and ceilings. It can be difficult to identify asbestos with the naked eye, which is why it's essential to use a professional asbestos surveyor to do the job.