You can trust this Rockwool ComfortBoard IS insulation for your exterior walls and residential basements. The 6 light and rigid panels have plenty qualities such as water repellent, fire-resistant, vapour permeable, and offers excellent sound absorption. In addition to these features, they are easy to cut, do not rot nor encourage fungus or mould growth and are CFC and HCFC free. The stone wool formula is made from natural and recycled materials and have GREENGUARD certification to ensure good health for you and your family. 1.5 x 24 x 48 in. Covers up to 48 sq. ft. R6.