Solid insulated metal door, polyurethane insulation Solid insulated metal door, polystyrene insulation Vermiculite (WARNING: may contain asbestos)Īluminum / Vinyl Siding (1/2' insulation) R-19 Mineral Fiber with 2圆 wood studs 24' OC R-19 Mineral Fiber with 2圆 metal studs 24' OC R-19 Mineral Fiber with 2圆 metal studs 16' OC R-11 Mineral Fiber with 2x4 metal studs 24' OC R-11 Mineral Fiber with 2x4 wood studs 16' OC
R-11 Mineral Fiber with 2x4 metal studs 16' OC Consult manufacturer literature for values specific to your project. For instance, using argon gas in a double pane insulating glass unit will dramatically improve the R-value. The R-values for specific assemblies like doors and glazing in the table below are generalizations because they can vary significantly based on special materials that the manufacturer uses. U Factor Equation Tables of Building Material R-values
