Typically, floor insulation is found under raised subfloors and in the floor structure above unheated basements. It is not found under slabs, and typically not found in the floor structure above heated basements. Use this component to enter the area of the subfloor with R-13 floor insulation (3-5/8" fiberglass batt or blanket) to R-19 floor insulation (6-1/2" fiberglass batt or blanket), typical of a moderate climate.
Use the following map as a guide to the climate zones in the United States:
Climate Zones: Mild Moderate Extreme