Johns Manville Formaldehyde-Free™ Unfaced Fiberglass and acoustical insulation offers R-Values of up to R-49, and is offered in precut batts to fit standard wall cavities or rolls for custom installation in any size cavity. Unfaced insulation reduces sound transmission through walls, ceilings and floors, and can be used in a variety of wood frame, engineered wood and steel frame construction applications, including new construction and retrofit.

Features

• Thermally Efficient - Effective resistance to heat transfer, with R-values up to R-49.
• Formaldehyde-Free - Will not off-gas formaldehyde in the indoor environment.
• Sound Control - Reduces sound transmission through exterior and interior walls, floor and ceiling assemblies.
• Fire-Resistant 
• Resilient Inorganic Glass - No rotting, mildew or deterioration. Also noncorrosive to pipes, wiring and metal studs.
• Superior Performance - Stable bonded glass fibers will not slump within the wall cavity, settle or break down during normal applications.

170.66 sq ft/bag