Minimum Roof Pitch For Standing Seam

We recommend 5 degrees however due to site conditions and execution.

Minimum roof pitch for standing seam.

Roof pitch multiplier table. Thermoset and thermoplastic single ply roofing requires a minimum roof pitch of 1 4 12 or greater. Speaking about standing seam metal roof slope it is a general and a self evident knowledge that the steeper it is the faster it is for snow rain or drain to come down the roof. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more.

Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12. You can often see such examples of use over metal decks. In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. Modified bitumen roofing requires a minimum roof pitch of 1 4 12 or greater.

Standing seam roof systems must have a minimum roof slope of 1 4 12. Roof slope equivalents as rise. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope.

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. Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered. Minimum metal roof slope depends on the roof profile building design climate and site location. Sig zinc and copper recommend that the minimum pitch for a standing seam zinc roof is five degrees with an absolute minimum of 3 degrees.

The profile refers to the shape the metal sheets take when they bend to. Degrees to pitch rise in run table. For a 1 12 pitch roof the only metal product i recommend is a mechanically seamed standing seam. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run.

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. Typically large footprint single story warehouses and pre engineered metal buildings will utilize low slope metal roof systems.