Click to add item guardian r 19 unfaced fiberglass insulation roll 23 x 39 17 75 1 sq. Unfaced insulation doesn t have a vapor retarder. R value is the capacity of an insulating material to resist heat flow.
Johns Manville R38 64 Sq Ft Unfaced Fiberglass Batt Insulation With Sound Barrier 24 In W X 48 In L With Images Fiberglass Batts Batt Insulation Fiberglass Insulation
