Thread: Flat Seam Roof
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Old 09-17-2015, 02:13 AM
MattM MattM is offline
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I wouldn't leave any galvanized exposed to direct rain and used as your roof material in any thickness less than 24 gauge. Think how insignificant the zinc coating is on 28 gauge. Fine for interior uses. Absolutely low quality in external applications.

If you want ridiculous thin material use aluminum. Whatever you use do not skimp on ice and water shield underneath.
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