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<div itemScope itemProp="mainEntity" itemType="https://schema.org/Question"><div itemProp="name"><h2>What is the best underlayment for metal roof?</h2></div><div itemScope itemProp="acceptedAnswer" itemType="https://schema.org/Answer"><div itemProp="text">The spacing of purlins on roofs and girts on wall is usually 4 to 6 ft. Numbers 20 and 22, U.S. Standard gage, are generally used for roofing; No. 24 for siding.</div></div></div>
If you are installing a metal roofing on a structure like a patio area cover, you may not need this insulation layer. (Rather, you can just safeguard the metal roofing directly to the wood beam of lights.) Cut the roof covering really felt to fit with an energy knife.

<ul><li>In 1837, the French started galvanizing the steel sheets for roof with zinc, which secures them from corrosion.</li><li>While we often
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