An R-value is a rating used to measure how well insulation can resist heat flow. The higher the R-value, the greater the insulation properties and the slower heat and cold flows through it. Because insulation with higher R-values is more energy-efficient, the colder the climate, the higher the required R-value.
Different areas of the home have different recommended R-values, depending on what materials are used and how much space is available for insulation. The table below shows the suggested R-values for homes.
The R-value you need will also depend on where you live. The map shows you what R-values you might need, based on your main home heating source.
|Area of Home||Good||Better||Best|
*please consult your local building code for the minimum R-value required