Metal roofing is one of the oldest and most trusted roofs in the industry. Today, metal roofs are installed on a variety of structures in both residential and commercial construction. The most common type of application is a standing seam system. The metal panels are typically fabricated from painted galvanized steel (G-90), aluminum and copper. The metal panels come in a wide variety of colors and offer finish warranties of 20 years and longer. Standing seam metal systems are assembled in a side-by-side formation of flat metal panels that are secured in place with concealed fasteners and a variety of seaming options. Metal roof systems can be applied on structures, which exceed a 2:12 slope.