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.

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 manufactures allow applications of metal coverings on slopes of 12 or even more. Typically large footprint single story.

The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. A lightweight roofing system also places fewer demands on a building s structural support system an important consideration in earthquake prone areas. 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. You can often see such examples of use over metal decks.

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 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 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.

Minimum metal roof slope depends on the roof profile building design climate and site location. Standing seam roof systems must have a minimum roof slope of 1 4 12. The minimum pitch for shingles is 1 6 which is equivalent to 4 inches rise to 24 inches run. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

Mbma classi fies metal roof systems into two types through fastener metal roof systems and standing seam metal roof systems.