Which building material is often associated with asbestos?

Vermiculite insulation is often associated with asbestos because it was commonly used in insulation products prior to the awareness of the health risks posed by asbestos. Vermiculite insulation was mined in areas where asbestos was naturally present, leading to contamination. When these materials were manufactured into insulation, they retained asbestos fibers, which can be released into the air if the insulation is disturbed or damaged.

The other materials listed do not have the same historical association with asbestos. Fiberglass insulation is made from fibers of glass and does not contain asbestos. Spray foam insulation is a modern solution that uses polyurethane or similar compounds, eliminating any risk from asbestos. Cellulose insulation, primarily made from recycled paper products, also does not contain asbestos. Thus, vermiculite insulation remains the key material linked to asbestos exposure concerns.