The R-value of insulation can range from R3.14 per inch for some batt insulation to as high as ____ per inch for polyisocyanurate foam, but there are other factors to consider such as embodied energy and ease of installation.

Question

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Polyisocyanurate foam insulation can have an R-value as high as R7.20 per inch, making it one of the most efficient insulation materials in terms of thermal resistance per inch.

The R-Value of Insulation Can Range from R3