Guardian Knauf Standard Unfaced Roll Fiberglass Insulation, part number UR05TAK, is an unfaced fiberglass insulation roll for homeowners, DIY installers and professionals who want to insulate a home or commercial structure. It is made in the US. Knauf fiberglass products act as a thermal barrier, providing energy savings and lower energy bills in both hot and cold climates. They help create a more comfortable indoor environment and provide acoustical insulation to a structure. Specifications for UR05TAK: R Value R19, width 15 inches, length 39.16 feet, thickness 6.25 inches, coverage area 48.96 square feet. The material is fiberglass, the type is unfaced, the unit is a roll and the package type is a bag. Unit weight is 12.730 pounds. Knauf ECOBATT products feature handling that cuts easily and cleanly, recovers quickly, is less dusty and installs easily enough for a professional or DIY installer. Knauf Performance+ products are described by the manufacturer as Asthma and Allergy Friendly Certified and Verified Healthier Air, and its residential Performance+ insulation products meet three criteria: formaldehyde-free binder, extremely low dust levels after installation, and extremely low VOC emissions at 24 hours and 14 days after installation. Q: How much area does one roll cover. A: One roll covers 48.96 square feet. Q: What is the R Value and thickness. A: The R Value is R19 and the thickness is 6.25 inches. Q: Is this insulation faced. A: No, this roll is unfaced. This listing is for a pack of 3 units.