common roof gauges

Ben Gordesky
We are solar installers. I recently did a solar site visit for a farmer who has a relatively new barn with a metal roof with a trapezoidal profile. Using my metal thickness gauge, it seemed that the metal was a 27-gauge. However, I am suspicious that it is really a 26-gauge metal with a worn edge that enabled me to squeeze my metal gauge onto it in the 27-ga slot. I have heard people talk about a 24, 26 and 29 gauge roof. But, never a 27 gauge roof. If the roof gauge is 26 or heavier, we can attach the solar directly to the roof using an S-5 protea bracket. That is why this picky question. Thanks all for your help.
Eric Novotny
An informed customer is the Best Customer!
Could be a thinner metal but by the time you figure in coating thickness it gets to a 27 gauge.

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