Minimum Slope Of Standing Seam Roof

Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope.

Minimum slope of standing seam roof.

The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. The minimum roof slope allowed by code for any type of roofis in 12 applicable only to coal tar pitch roof systems. Minimum roof slope roof pitch r905 10 2 1. That means there is at least 3 of vertical rise to the roof slope for every 12 it goes back horizontally.

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. A standing seam design assures adequate draining from rain and snow effectively eliminating ponding leaks and related problems typically associated with built up roofs. You can often see such examples of use over metal decks. The following tableprovides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

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. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope. Mechanically seamed standing seam metal roofs commonly used on large warehouses and the like can be used on much lower roof pitches. The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope.

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. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more.