Low Slope Metal Roof Details

Low slope metal roofs require less material which reduces the overall load on the building s structure.

Low slope metal roof details.

Low slope metal roofs have simple geometries and are easier and less expensive to install that medium to steep slope roofs. Generic valley treatment details for metal panel roofs for low slope with and without substrates are included in the mbma metal roofing systems design manual chapter 12 metal roof details. Regular asphalt shingles and standard skylights will work at pitches of 4 12 or greater but at lower pitches you have to use different materials. It is important to note structural metal panel roof systems can be used for steep slope roof assemblies too.

A typical low slope metal roof has at least 25 recycled content and at the end of its long useful life is 100 recyclable. 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. By low slope roofing we mean any roof that is pitched at less than 4 inches of rise in 12 inches of run or 4 12 pitch. There is only one category of metal roof systems used in low slope applications structural metal panel.

Minimum metal roof slope depends on the roof profile building design climate and site location. 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. That includes soldered metal roofing or synthetic membranes. Structural metal panel roof systems can be used for low slope roofs because of their hydrostatic or water barrier characteristics.