Blown-in insulation refers to blowing or spraying insulation product into wall cavities, attics, and floors. Methods vary depending on the form of insulation selected. Loose-Fill Fiberglass. In its loose-fill form, fiberglass is made from glass that is blown or spun into fibers. It is installed using a blowing machine.
Precut sections of fiberglass or rock wool insulation. Designed for easy handling and use between framing, such as studs and joists. Available either with or without paper or aluminum foil facing. Can be used in floors, walls, attics and ceilings.
Radiant barriers are installed in homes -- usually in attics -- primarily to reduce summer heat gain and reduce cooling costs. The barriers consist of a highly reflective material that reflects radiant heat rather than absorbing it. They don't, however, reduce heat conduction like thermal insulation materials.
The most common form of home insulation is “Batt and Roll” or “Blanket” insulation. It is typically stored in rolls, is generally made of fiberglass and is the least expensive way to insulate a home.