Low Slope Metal Roof Detail

Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12.

Low slope metal roof detail.

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. 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. The prevalent rib geometries for low slope metal panel roofs include the trapezoidal or vertical rib profile. If the ssr is attached directly to open framing it is typically designed to expand and contract and must be allowed to float.

That includes soldered metal roofing or synthetic membranes. A lightweight roofing system also places fewer demands on a building s structural support system an important consideration in earthquake prone areas. 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. Available in 12 16 and 18 widths tite loc and tite loc plus panels can be produced in 22 and 24 gauge steel or 032 and 040 aluminum.

Minimum metal roof slope depends on the roof profile building design climate and site location. 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. Low slope metal roofs have simple geometries and are easier and less expensive to install that medium to steep slope roofs. 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.