Insulation R-Value Calculator | JobKitHub February 21, 2026 by Edward Insulation R-Value Calculator – JobKitHub 🏠 Insulation R-Value Calculator Calculate and optimize your home insulation R-Value measures insulation’s resistance to heat flow. Higher R-Value = better insulation. This calculator helps determine if your current insulation meets recommendations for your climate zone. Climate Zone Zone 1 (Hawaii, South Florida) – Very Hot Zone 2 (South Texas, Central Florida) – Hot Zone 3 (Gulf Coast, Southern California) – Warm Zone 4 (Mid-Atlantic, Pacific Northwest) – Mixed Zone 5 (Midwest, Northeast) – Cool Zone 6 (Northern States) – Cold Zone 7 (Northern Border) – Very Cold Zone 8 (Alaska) – Extreme Cold 🏠 Attic/Ceiling Insulation Material Fiberglass Batts (R-3.2/inch) Blown Fiberglass (R-2.5/inch) Blown Cellulose (R-3.7/inch) Spray Foam Open Cell (R-3.7/inch) Spray Foam Closed Cell (R-6.5/inch) Mineral Wool (R-3.3/inch) Thickness (inches) 🧱 Walls Insulation Material Fiberglass Batts (R-3.2/inch) Blown Cellulose (R-3.7/inch) Spray Foam Open Cell (R-3.7/inch) Spray Foam Closed Cell (R-6.5/inch) Mineral Wool (R-3.3/inch) Rigid Foam Board (R-5.0/inch) Thickness (inches) 📐 Floor/Basement Insulation Material Fiberglass Batts (R-3.2/inch) Spray Foam Open Cell (R-3.7/inch) Spray Foam Closed Cell (R-6.5/inch) Rigid Foam Board (R-5.0/inch) Mineral Wool (R-3.3/inch) Thickness (inches) Calculate R-Values Reset
