Batt insulation or often referred to as blanket insulation, generally consists of fiberglass, mineral wool and even denim cotton. It is pre-cut and sized to fit most standard building sizes and are best suited for residential houses and commercial applications. Most commonly it is used in between wall studs, attic rafters, and ceiling joists. This type of insulation can be used throughout the house, insulating floors, walls, ceiling, and attics as well as basements and crawl spaces.