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VIDEO: What is R-Value?

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Insulation levels are measured in R-value, but what does R-value mean? R-value is the insulation's resistance to heat flow. The higher the R-value, the less heat is transferred in or out.

Any type of insulation can be installed to have any R-value level; it may just take more or less insulating material to reach that level.

Recommended R-values change depending on climate, the type of building and the location of the insulation within that building. The level of R-value achieved is also based on proper installation. Poor air or vapor seal can reduce the effectiveness of insulation.

Properly installed, however, any type of insulation with the recommended R-value level will increase comfort and efficiency year-round.

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