Cellulose Insulation Material

Cellulose—a material used as loose-fill insulation—is made from recycled wood fiber, primarily newsprint. The wood fiber is shredded and pulverized into small, fibrous particles that pack tightly into closed building cavities, inhibiting airflow. This provides a thermal resistance of R-3.6 to R-3.8 per inch.

Manufacturers add chemicals to the cellulose to make it insect and fire resistant. Cellulose insulation absorbs more moisture than fiberglass or mineral wool, and will hold in moisture until drying conditions occur. This can result in matting down, and possibly washing away the fire retardant. Cellulose insulation can be applied dry or wet, but if it is applied wet we recommend professional installation to ensure the material dries thoroughly. In addition, do not allow heaters or recessed light fixtures to come into contact with the material.