Low Slope Roofing Metal

There is only one category of metal roof systems used in low slope applications structural metal panel.

Low slope roofing metal.

Rain gutters guards downspouts. 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. In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12.

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. 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. 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.

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. 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. At sheffield metals we also recognize low slope as 3 12 and below. A low slope roof is defined in the industry as a roof that has a pitch equal to 3 12 or less.

Low slope metal panel roofing may be a standing seam roof ssr through fastened roof tfr or insulated metal panel imp roof. A lightweight roofing system also places fewer demands on a building s structural support system an important consideration in earthquake prone areas. The metal roof retrofit system is installed over steel bar joists that are spanning parallel to the new roof slope. An ssr has side joints between the roof panels that are arranged in a vertical position above the roof line.

Low slope metal roofing materials include perimeter edge flashing soffit panels drainage and es 1 rated edge systems from sheet metal supply.