Low Slope Roofing Metal

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.

Low slope roofing metal.

A lightweight roofing system also places fewer demands on a building s structural support system an important consideration in earthquake prone areas. Structural metal panel roof systems can be used for low slope roofs because of their hydrostatic or water barrier characteristics. 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. 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.

The metal roof retrofit system is installed over steel bar joists that are spanning parallel to the new roof slope. Low slope metal roofs require less material which reduces the overall load on the building s structure. An ssr has side joints between the roof panels that are arranged in a vertical position above the roof line. A low slope roof is defined in the industry as a roof that has a pitch equal to 3 12 or less.

Minimum metal roof slope depends on the roof profile building design climate and site location. 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. Low slope metal roofing materials include perimeter edge flashing soffit panels drainage and es 1 rated edge systems from sheet metal supply. 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 metal panel roofing may be a standing seam roof ssr through fastened roof tfr or insulated metal panel imp roof. In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. Typically large footprint single story warehouses and pre engineered metal buildings will utilize low slope metal roof systems. 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.