Minimum Slope For Standing Seam Roof

In retrofit projects a sub framing system is attached to the existing flat roof surface to provide a minimum 12 roof pitch.

Minimum slope for standing seam roof.

Mbma recommends a minimum slope of 1 2 in 12 2 4 degrees for through fastener metal roof systems and 1 4 in 12 1 2 de grees for standing seam metal roof systems. That means there is at least 3 of vertical rise to the roof slope for every 12 it goes back horizontally. This means for every 12 horizontal units the roof must rise a minimum of one half vertical unit. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

You can often see such examples of use over metal decks. That is a 14 degree angle. 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. The associa tion also stresses deflection of purlins and rafters under dead and live loads.

The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered. 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.

Standing seam roof systems must have a minimum roof slope of 1 4 12 2 slope. In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. A standing seam design assures adequate draining from rain and snow effectively eliminating ponding leaks and related problems typically associated with built up roofs. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope.

Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. Through fastener metal roof systems and standing seam metal roof systems. The profile refers to the shape the metal sheets take when they bend to.