For a metal roofing system, the metal panels should typically overhang the drip edge and the fascia board by approximately one to two inches. This specific overhang distance ensures that rainwater cascading off the metal roof clears the outer fascia board and gutters completely, preventing water from blowing backward against the building siding or trickling down behind the gutter system. Exact overhang recommendations can vary based on local wind loads and manufacturer panel design specifications.
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