Pole barn construction w/ apartment above in loft area. No building permit secured; new buyers insisting upon an after-the-fact permit from sellers prior to close (very wise). 2x6 rafters, sheathed apparently only with standing seam metal roofing. I can’t imagine metal roofing provides much shear. Could this ever be acceptable? I know this is an exterior picture, but the theme without roof sheathing continues where visible inside. Thanks for your input.