Standard Details for Metal Roofing & Siding - Best
2018-10-30 · Aluminum roofing and siding sheets are rollformed from hard-ened, tempered metal for maximum strength. If a sheet must be bent, a gentle 90-degree bend is the maximum recommended. Metal should not be re-bent once it has been formed, nor should it be folded back on itself. When a metal roofing sheet must be installed on a curved roof,
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