R Value Meaning and Map

Using R value guidelines to upgrade your insulation is likely a smart move. R values, established by the U.S. Dept. of Energy for walls, ceilings, floors, and other areas of your home, are really minimum requirements. Check insulation R values recommended for your area on the map and table here. Increased insulation R value in your ceilings and wall insulation will bank extra energy dollars saved in no time!