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Nope, any condensate that forms out there (and there should be next to none, or *none*) will drip or evaporate harmlessly away. It is only *inside* the coop that condensation is a problem and thus that insulating a very thin conductive roof or wall is a priority. (And even that, only in...
I wouldn't do it. Three reasons, the first being the biggie:
1) you cannot remove and reattach metal roofing repeatedly without getting leaks and creeping looseness of screws. You will never get the roof quite right again, and furthermore you will be reaming out the screw holes so that it...