Standing Seam Metal Roof Minimum Slope

Mbma recommends a minimum slope of 1 2 in 12 2 4 degrees for through fastener metal roof systems and 1.

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. Typically large footprint single story. 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. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12.

Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. Typically low slope metal roof systems vary in weight from 40 to 135 pounds per 100 square feet making them among the lightest roofing products and the easiest to install. Mbma classi fies metal roof systems into two types through fastener metal roof systems and standing seam metal roof systems. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12.

The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope. Low slope metal roofs require less material which reduces the overall load on the building s structure. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12. Standing seam is the metal roof profile that has been gaining more popularity nowadays due to its clean and modern looks.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Standing seam roof systems must have a minimum roof slope of 1 4 12. A lightweight roofing system also places fewer demands on a building s structural support system an important consideration in earthquake prone areas. You can often see such examples of use over metal decks.

Minimum metal roof slope depends on the roof profile building design climate and site location.