Smart moves for a warmer home

Learn about R-value

Insulation’s R-value lets you know how resistant it is to heat flow. The higher the R-value, the higher the resistance.

Different parts of your home require different R-values of insulation. Attics and cathedral ceilings require the most, while wall cavities require the least.

How much insulation you need depends on how old your home is and your climate.

The older your home, the more likely it needs more insulation. State building codes didn’t require insulation in new homes until the late 1970s.

The amount of insulation you need in your attic ranges from R25 to R60, depending on whether you live at the southern tip of Florida or the northern tip of Maine and whether you have any existing insulation.

Wall cavities need an R-value of 13 to 21.

R-values are cumulative, so if you have existing insulation with an R-value of 5, you can add insulation with an R-value of 25 to get an R-value of 30.

Check the North American Insulation Manufacturers Association website ( to see how much insulation your home needs.

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