Each package covers up to 32 sq. ft. Consisting of resilient glass fibres, the 11 1/2 inch thick batt features thermal properties which help lower energy costs. This attic and cathedral ceiling insulation improves room acoustics by dampening sounds coming through walls, ceilings and floors. The insulation is non-corrosive, so it won't react with the metal studs, pipes and wiring it touches. The noncombustible material features low levels of flame-spread and smoke development. Certified by GREENGUARD, it's formaldehyde-free with low concentrations of VOCs to keep the air quality of your home safe. Made with 50% recycled materials, it's an eco-conscious way to insulate your home. For long-lasting durability, this crawl space fibreglass insulation won't rot or grow mildew. Each package includes six sheets measuring 48 in L x 16 in W.