Standing Seam Roofing Minimum Slope

Standing seam roof systems must have a minimum roof slope of 1 4 12 2 slope.

Standing seam roofing minimum slope.

Roof systems must meet a governing. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. I am looking at the ibc minimum roof slope requirement for standing seam metal roof. Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered.

So typically we follow 2 slope is that meeting the code even if the slope is slight shy of 1 4 per foot. And profiles like standing seam which utilize a concealed connection to the roof deck require only a one and a half inch minimum pitch. 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. 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. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch 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. Manufacturers specify a minimum pitch for each of the profiles they offer and sometimes they can be installed at a lower pitch if special underlayment or installation procedures are followed.

The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope. 2 exactly does not translate to 1 4 per foot. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. The profile refers to the shape the metal sheets take when they bend to form panels.

I understand this is more of rounding off to get to a nice number. This means for every 12 horizontal units the roof must rise a minimum of one quarter vertical unit. The associa tion also stresses deflection of purlins and rafters under dead and live loads be checked to ensure positive drainage.