For instance, when comparing spray foam insulation R-value vs. fiberglass insulation R-value, spray foam typically has the higher average R-value per inch. If you aren’t sure which insulation ...

Insulation types with higher R-values offer better performance. For attic walls, the recommended R-value varies based on climate zones. Each type has pros and cons. For example, fiberglass ...

Carefully roll or lift fiberglass batt insulation ... Department of Energy’s guidelines for recommended insulation levels (measured in R-value) based on your climate zone.