What was the primary use of asbestos in construction?

The primary use of asbestos in construction was insulation against heat. Asbestos is a naturally occurring mineral known for its heat-resistant properties, which made it an ideal material for insulating buildings, pipes, and boilers. It was commonly used in various forms, such as insulation blankets, spray-on coatings, and fireproof panels, helping to prevent the spread of fire and maintain temperature control.

While asbestos had other secondary applications, such as providing some soundproofing and being mixed with certain materials for strength, its most significant and widespread use was indeed in heat insulation. The focus on its insulation properties played a pivotal role in its popularity in the construction industry until the health risks associated with asbestos exposure became well-known.