A 26 gauge standing seam metal roof on a brick ranch in Rochester. These photos were taken during the install rather than after it.
One of them shows the high-temp synthetic underlayment going down before the panels, which is what belongs under metal. Another shows a panel on the sawhorses before it goes up. On a standing seam roof the panels lock to each other along raised seams, so there are no exposed fasteners across the face of it.