The term loose-fill insulation or blown-in insulation refers to the process of filling stud or joist cavities with insulation in the attic or walls. This process is done by a machine that mixes the material and shoots it through a hose creating an evenly insulated surface. Loose-fill insulation is essentially millions of insulation pieces who creates air pockets which assure better insulating power. Since the pieces are tiny and are blown everywhere it is possible to cover small areas with difficult access and therefore this method is known to be a fantastic thermal barrier.