With a thermal conductivity rating of approximately 0.023 W/mK, Rockwool's Fabrock 85 1-Sided FSK Foil Insulation Panels offers superior thermal resistance, achieving an impressive R-value of around R-4.3 per inch. This makes it an ideal choice for reducing energy costs and improving HVAC efficiency. The non-combustible stone wool composition enhances fire safety, ensuring compliance with stringent building codes. Fabrock 85 panels are versatile, suitable for various applications including walls, ceilings, and ductwork.