Metal roofing, low maintenance, crisp aesthetic and affordable. It can be site-fabricated, where the pans are formed from metal coil stock, or it can be premanufactured and arrive onsite already formed into pans. I like the look of natural Galvalume, a bright silver that dulls with age, and its natural patina protects the finish from corrosion. When that’s not right for the project, I select a gray Galvalume that mimics a natural metal finish. Zinc Grey is a good default choice.