What is the R-value of 1" of fiberglass insulation?

The R-value is a measure of thermal resistance, indicating how well a particular material resists the transfer of heat. In the case of fiberglass insulation, it typically has an R-value of around R-3 to R-4 per inch of thickness. When considering 1 inch of fiberglass insulation, a common standard value is indeed R-3.

This value is significant in evaluating insulation materials and comparing their effectiveness in preventing heat flow. It’s important to remember that different types of insulation have varying R-values, but for fiberglass specifically, the R-3 designation for 1 inch is helpful for understanding insulation requirements in building construction and energy efficiency considerations.

Other choices present values that fall outside the typical range for fiberglass insulation. This context reinforces the accuracy of R-3, as it aligns with standard specifications associated with this type of insulation material.