What is the R-value per inch of material for fiberglass batt insulation?

Fiberglass batt insulation has an R-value of approximately 3.2 per inch of thickness. The R-value measures the insulation's ability to resist heat flow; higher R-values indicate better insulating effectiveness. This characteristic makes fiberglass batt insulation a popular choice in residential construction for thermal insulation, as it provides a good balance of R-value and cost-effectiveness.

While there are other insulation materials with higher R-values, such as spray foam, fiberglass batt remains a staple due to its ease of installation and versatility in various applications. Understanding the specific R-value per inch is crucial for homeowners and inspectors alike when evaluating insulation effectiveness and determining whether additional insulation is needed in a given space.