Blanket insulation is he most common and widely available type of insulation usually in the form of batts or rolls. Fiberglass insulation is made from molten glass that is spun or blown into fibers using about 20% recycled glass.. Its most common forms are rolls and batts, which are used in wall cavities, crawl spaces, and attics..
Batt and blanket insulation is made of mineral fiber — either processed fiberglass or rock wool – and is used to insulate below floors, above ceilings, and within walls. Generally, batt insulation is the least expensive wall insulation material but requires careful installation for effective performance. A tried and true insulation that has been field tested for generations.