Standing Seam Metal Roof Minimum Slope

The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.

Standing seam metal roof minimum slope.

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. 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. 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.

Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. Standing seam is the metal roof profile that has been gaining more popularity nowadays due to its clean and modern looks. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12. Minimum metal roof slope depends on the roof profile building design climate and site location.

Mbma classi fies metal roof systems into two types through fastener metal roof systems and standing seam metal roof systems. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. Mbma recommends a minimum slope of 1 2 in 12 2 4 degrees for through fastener metal roof systems and 1. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12.

The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. The minimum pitch for shingles is 1 6 which is equivalent to 4 inches rise to 24 inches run. Low slope metal roofs require less material which reduces the overall load on the building s structure. You can often see such examples of use over metal decks.

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