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Upgrading your home's insulation is one of the easiest and most effective ways to save money on energy bills while also improving comfort levels in both winter and summer. CertainTeed created the Insulation Calculator to help you figure out how much insulation you need to achieve these goals.

R-Value measures thermal resistance, the ability of insulation to prevent heat from escaping or intruding through the walls and roof of your home. The higher the R-Value, the more effective the insulation will be – but your optimum R-Value depends on where you live. Basically, the colder the climate, the higher the R-Value.
Insulation Calculator
To find out the minimum R-values for different areas of your home, simply select the state and county where you live. The Insulation Calculator will provide recommended R-values and products, and help you calculate your project's square footage. Also, calculate your potential energy savings and take advantage of the many energy rebates and incentives available. Click here to learn more.
HOW MUCH INSULATION DO I NEED?
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 IECC Minimum
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CertainTeed Recommended
R-Values
Recommended
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Attic     
Wood Frame Wall     
Mass Wall     
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Basement Wall     
Crawlspace Wall     
Vapor Retarder