Inside gable and joist view of ongoing project, insulation of attic with fiberglass cold barrier and reflective heat barrier between the attic joists
What Does the R-Value of Insulation Mean?
The R-value of insulation is its ability to resist the transfer of heat through the insulation. Heat transfer is the loss of warm air from inside the home to the exterior. It also implies the transfer of heat during the warm summer months from outside into the home. So, insulation with high R-values resist heat transfer much better than insulation with low R-value.
