Standing Seam Metal Roof Minimum Slope

Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope.

Standing seam metal roof minimum slope.

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. Corrugated metal roofing has the same minimum pitch. That means there is at least 3 of vertical rise to the roof slope for every 12 it goes back horizontally.

Standing seam roof systems must have a minimum roof slope of 1 4 12 2 slope. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. Mechanically seamed standing seam metal roofs commonly used on large warehouses and the like can be used on much lower roof pitches. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to.

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 pitch is measured in inches of vertical rise per foot of horizontal run and the 5v crimp profile shown above requires a minimum slope of three in twelve or 3 12 3 inches vertically per 12 inches horizontally. Using a measuring device move inward on the flat roof plane parallel to the ground 12 inches. For example if your roof rose 8 inches for every 12 inches the roof pitch is 8 12.

Mbma classi fies metal roof systems into two types through fastener metal roof systems and standing seam metal roof systems. Once you reach 12 inches mark it and then measure how far the roof rises perpendicular to the ground. This means for every 12 horizontal units the roof must rise a minimum of one half vertical unit. That is a 14 degree angle.

The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope.