What is the R-value range for fiberglass batts?

Fiberglass batts are commonly known for their thermal resistance properties, represented by the R-value. The R-value indicates the insulation's ability to resist heat flow, with higher values reflecting better insulating effectiveness. For fiberglass batts, the typical R-value range is generally from approximately R-3.1 to R-4.3 per inch, depending on factors like density and the specific type of fiberglass insulation.

Selecting the range of R-3 to R-4 aligns with the common performance metrics for standard fiberglass batts used in residential construction. This range reflects the effectiveness of the insulation in moderating heat transfer, making it suitable for various building applications.

The other ranges mentioned do not accurately represent the performance of fiberglass batts. Lower ranges like R-2 to R-3 significantly underestimate the insulating capability, while higher ranges such as R-5 to R-6 exceed the typical performance metrics for this material, which is generally found in denser or upgraded insulation types.