Metal Roof Pitch Minimum Standing Seam

Degrees to pitch rise in run table.

Metal roof pitch minimum standing seam.

A standing seam design assures adequate draining from rain and snow effectively eliminating ponding leaks and related problems typically associated with built up roofs. Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered. In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. Low slope metal roofs require less material which reduces the overall load on the building s structure.

Typically large footprint single story. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. Standing seam roof systems must have a minimum roof slope of 1 4 12. The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope.

You can often see such examples of use over metal decks. 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. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. In retrofit projects a sub framing system is attached to the existing flat roof surface to provide a minimum 12 roof pitch.

Minimum metal roof slope depends on the roof profile building design climate and site location. Roof slope equivalents as rise. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. 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. Run in degrees and as percentage the minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12.

Complete list of roofing types.