What is the difference between fiberglass insulation and cellulose insulation?
Fiberglass is made from melted sand which is spun much like cotton candy. It comes in batt form that can be cut and fit into wall cavities and in loose form that can be blown into attics. Cellulose is a loose fill product made of newspaper and treated to be fire retardant that can be blown into attics and dense packed into closed cavities.