What is R – Value

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.

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.