Air barrier with polyiso foam insulation
I am building a house with steel C roof joists (flat) and polyiso 9 inch (3 3" layers) foam underneath. ( all material is reclaimed and free)
Should I use an air or moisture barrier between foam and steel joists? House is in Lexington, Va.
Posted Sat, 01/12/2013 - 09:29
Other Questions in Energy efficiency and durability