How can I maximize the R-value of floor insulation in a walk-up attic?
old house with walk up, unfinished attic. some old insulation under floor boards. don’t want to lose floor space which is used for storage. taking up floor to air seal around lights, etc. so I am already in the space. can I put rigid foam in between joists before putting floor planks back down. Not much room there for adding cellulose or fiberglass. foam panels have more r-value. attic has vent at ridge and small windows in gable.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part