Product description

Fiberglass loose-fill insulation is inorganic and noncombustible. The fibers will not rot or absorb moisture and do not support the growth of mildew, mold, or fungus. Fiberglass absorbs about 1 per­cent of its weight, but any insulation can absorb moisture if exposed to extremely high humidity. The moisture vapor absorp­tion of fiberglass loose-fill insulation shall not be more than 5 per­cent by weight when tested in accordance with ASTM C1104. It is also not subject to drastic settling, usually about 1 or 2 percent in attic spaces up to a maximum of 4 percent.2