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What Is R-Value?

Insulation is identified and labeled by R-value. “R” stands for resistance to  heat flow.  

The higher the R-value, the greater the insulating power.

Manufacturers of insulation products print the R-values of their products either on bags or on labels
attached to plain bags.

In most cases, R-values are also printed on the facings of batts and rolls.

On unfaced insulation, the R-value is printed on the product or indicated by stripe coding