Johns Manville Formaldehyde-Free™ FSK-25 thermal and acoustical fiberglass insulation is available in R-Values up to R-30, and is offered in batts to fit standard wall cavities. FSK-25 faced batts combine fire resistance with excellent vapor resistance, and can be used in a wide variety of wood frame, engineered wood and steel frame construction applications, including new construction and retrofit. FSK-25 batts are designed with a foil facer that can be left exposed where codes permit.

Features

• Thermally Efficient - Provides effective resistance to heat transfer with R-values up to R-38 (RSI-5.3).
• Formaldehyde-Free - Will not off-gas formaldehyde in the indoor environment.
• Sound Control - Reduces transmission of sound through exterior and interior walls and floor or ceiling assemblies.
• Fire-Resistant
• Durable Inorganic Glass - Will not rot, mildew or deteriorate and is noncorrosive to pipes, wiring and metal studs.
• Superior Performance - Bonded glass fibers are dimensionally stable and will not slump within the wall cavity, settle or break down during normal applications.
• Light Reflective - Reflective surface helps maximize lighting efficiency and may reduce lighting requirements. 

96 sq ft/bag