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Intalling 1 1/2" 16 gauge galvanized hat sections on two foot centers over new 30# roll felt. Should i use foam board or any radiant barrior over or between the hat sections before screwing panels to hat sections? what is the best way to insulate the attic. This is a hip roof. Planing of cutting an air space on ridge between rafters and using roll vent between panel and ridge row. Do I really need a radiant barrior with a white low rib metal roof?
7/14/2009