General Info

Insulation value is commonly referred to as resistance-value or R-value. R-value is the measure of a material's ability to resist heat flow. The higher the R-value, the more effective the insulation is in reducing heat flow. Insulation should be purchased on the basis of its R-value, not thickness or weight. One brand or type of insulation may be thicker or thinner than another. But if both have the same R-value, they will insulate equally.