Minimum Roof Pitch For Standing Seam Metal Roof

The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.

Minimum roof pitch for standing seam metal roof.

In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. Thermoset and thermoplastic single ply roofing requires a minimum roof pitch of 1 4 12 or greater. For this sort of system the panels are secured to the roof using hidden clips and then a seaming machine is used to crimp the seams closed so they will be water tight. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12.

Minimum metal roof slope depends on the roof profile building design climate and site location. Low slope metal roofs require less material which reduces the overall load on the building s structure. Roof pitch multiplier table. You can often see such examples of use over metal decks.

Modified bitumen roofing requires a minimum roof pitch of 1 4 12 or greater. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more.

Also pitch is often expressed in a shorthand style using just the first number. And profiles like standing seam which utilize a concealed connection to the roof deck require only a one and a half inch minimum pitch. Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered. The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope.

Roof slope equivalents as rise. Pbr which is typically used for industrial metal buildings can be installed as low as half inch pitch for example. 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. Standing seam roof systems must have a minimum roof slope of 1 4 12.

For a 1 12 pitch roof the only metal product i recommend is a mechanically seamed standing seam.