Types of Metal Roofs

Types of Metal Roofs
Standing-seam metal roofs have been popular for centuries. The term standing seam is used to describe any type of joinery that uses an upturned portion of the metal to connect adjacent metal sections. The joinery raises the seam above the drainage plane of the panel, creating its distinctive vertical lines. In the past, the original standing-seam roof involved only the 90-deg. adjacent metal upstands that could be single or double folded at the top. Today standing-seam joints are held together with a concealed clip, or cleat, at the seam. The clip involves a male and a female upstand that joins with or without seaming. Other versions of standing seam incorporate a nailing flange to the roof, which is then covered up by the next panel as it is snapped into place.http://www.ultraseam.com/