Low Slope Roofing Metal

But the taller profiles like standing seam and pbr shown below can be installed on roofs with as low as 1 4 or 1 2 in 12 pitch.

Low slope roofing metal.

Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. There is only one category of metal roof systems used in low slope applications structural metal panel. Determining which panel is the right choice for the slope on your project will depend on the manufacturer s minimum slope factor for that specific panel profile. The metal roof retrofit system is installed over steel bar joists that are spanning parallel to the new roof slope.

Structural metal panel roof systems can be used for low slope roofs because of their hydrostatic or water barrier characteristics. A low slope roof is defined in the industry as a roof that has a pitch equal to 3 12 or less. There are some opinions that standing seam metal roof minimum slope is 12 but it increases the possibility of leaking on the few first days of snow arrival. In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12.

Minimum metal roof slope depends on the roof profile building design climate and site location. An ssr has side joints between the roof panels that are arranged in a vertical position above the roof line. Typically low slope metal roof systems vary in weight from 40 to 135 pounds per 100 square feet making them among the lightest roofing products and the easiest to install. Typically large footprint single story warehouses and pre engineered metal buildings will utilize low slope metal roof systems.

The post and purlin system adds a continuous base zee which enables it to be installed over steel bar joists that are spanning perpendicular to the new roof slope. Low slope metal panel roofing may be a standing seam roof ssr through fastened roof tfr or insulated metal panel imp roof. Rain gutters guards downspouts. Low slope metal roofs require less material which reduces the overall load on the building s structure.

Because of the shallow height of the undulating ridges of the 5v and corrugated profiles and the use of exposed metal fasteners to screw the metal to the roof deck they are limited to a slope that will shed rain quickly.