Metal Roof Pitch Minimum Standing Seam

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

Metal roof pitch minimum standing seam.

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

Typically large footprint single story. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. A standing seam design assures adequate draining from rain and snow effectively eliminating ponding leaks and related problems typically associated with built up roofs. 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 without applied lap sealant must have a minimum roof slope of 3 12. You can often see such examples of use over metal decks. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12.

Minimum metal roof slope depends on the roof profile building design climate and site location. The minimum pitch for roll roofing is 2 12 or 2 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. In retrofit projects a sub framing system is attached to the existing flat roof surface to provide a minimum 12 roof pitch.

Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. Standing seam roof systems must have a minimum roof slope of 1 4 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. Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered.

Degrees to pitch rise in run table.