Not too long ago, asbestos was used frequently in a variety of products for consumers and for industry. For decades it was installed in factories and machine rooms during new construction or a renovation. The heat given off by the machinery in these rooms made insulation in the walls, floors, and ceilings a necessity.
Insulation made from asbestos was put into machine room walls on a regular basis during the 1950s, ‘60s, and ‘70s. Until the 1970s, it was the number one choice of factory owners and other businesses to use in their machine room walls and ceilings because it was easily attainable, inexpensive, was a poor heat conductor, and a good insulator.
Because of this, many factories and other buildings built before 1980 probably still contain asbestos insulation in their machine room walls. As long as it is there, it poses a threat to anyone who works inside these machine rooms, especially if they inhale any of the tiny fibers that may get airborne if the material is disturbed in anyway.