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The home I am building is a 28x30 Chalet style home. I am considering using metal roof sheeting. On a residential home, can the sheeting be installed with purlins alone attached to the rafters, without sheeting, or do I need both.
Usually with metal roofing we don't use solid sheathing. Use purlins, also called strapping in this case, on 12, 16 or 24 inch centers depending on the thickness of the metal. Your dealer should know the specs for the purlin centers.
