What is Fiberglass?
Fiberglass is a silicate fiber made from very fine strands of glass. Studies have shown inhaling airborne particles of these fibers can reduce lung function and cause inflammation. Fiberglass emits a synthetic material called styrene, which is considered a possible carcinogen. OSHA has set a permissible exposure limit of 15 mg per cubic meter for nonrespirable fibers and 5 mg per cubic meter for respirable fibers. The National Toxicology Program defines respirable fibers as fibers that can penetrate the alveolar region of the lung if they are inhaled.