What is Cellulose Insulation?
Cellulose insulation is a type of loose-fill insulation made from recycled wood fiber, primarily waste newspaper and cardboard. The wood fiber, which is composed of cellulose, 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.