Minimum Slope Of Standing Seam Roof

The following tableprovides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

Minimum slope of standing seam roof.

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. You can often see such examples of use over metal decks. The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope. Minimum roof slope roof pitch r905 10 2 1.

That is a 14 degree angle. 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. 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. Mechanically seamed standing seam metal roofs commonly used on large warehouses and the like can be used on much lower roof pitches.

That means there is at least 3 of vertical rise to the roof slope for every 12 it goes back horizontally. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more.

The minimum roof slope allowed by code for any type of roofis in 12 applicable only to coal tar pitch roof systems. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope.