Insulation levels are specified by R-Value. R-Value is a measure of insulation’s ability to resist heat traveling through it. The higher the R-Value the better the thermal performance of the insulation. The table below shows what levels of insulation are cost-effective for different climates and locations in the home.
Why is R-Value Important
R-Value is a term that usually enters the conversation when considering remodeling areas of a home, or ways to increase energy savings. R-value essentially measures the ability to prevent the transfer of heat through a given thickness of a material. The thicker the material insulating a home, the harder the insulation is working at preventing heat conduction. To simplify, this means the higher the R-value (R-19, R-20) the less heat loss occurs, which in return lowers energy bills.
Insulation Recommendations by Climate
This can be determined by dividing the recommended R-value for your area by the R-value of the particular type of insulation being used.
How Much Insulation do you need?
Since climates determine different R-values, what is your area’s recommended R-value?
To determine how much insulation your home may need:
Determine your area’s “Insulation Zone” by locating your city on the map.
Coordinate your area’s “Insulation Zone” number with the chart.
Identify the heating source (Gas, heat pump, fuel oil, furnace) of your home to determine the most recent government recommended R-value recommendations.