Standing Seam Metal Roof Minimum Slope

Low slope metal roofs require less material which reduces the overall load on the building s structure.

Standing seam metal roof minimum slope.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Mbma recommends a minimum slope of 1 2 in 12 2 4 degrees for through fastener metal roof systems and 1. 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. A lightweight roofing system also places fewer demands on a building s structural support system an important consideration in earthquake prone areas.

Standing seam roof systems must have a minimum roof slope of 1 4 12. 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. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12.

The minimum pitch for shingles is 1 6 which is equivalent to 4 inches rise to 24 inches run. 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. Mbma classi fies metal roof systems into two types through fastener metal roof systems and standing seam metal roof systems.

Minimum metal roof slope depends on the roof profile building design climate and site location. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. You can often see such examples of use over metal decks.

Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12.