Mike Conneely walks through what separates a quality standing seam metal roof from a problematic one, with oil canning as the central concern. Proper framing comes first — flat, true planes with no undulations — followed by material selection, specifically 24-gauge panels over the more common 26-gauge. Installation technique matters too: over-fastening restricts the natural movement metal needs across temperature swings. He also covers a copper flat roof section, where panel sizing, soldered interlocking joints, and dissimilar metal separation (copper against aluminum gutters) each play a role in long-term performance.

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