Minimum Slope For Standing Seam Metal Roof

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.

Minimum slope for standing seam metal roof.

Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12. Standing seam roof systems must have a minimum roof slope of 1 4 12. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. For metal roof systems.

In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. 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. Mbma classi fies metal roof systems into two types through fastener metal roof systems and standing seam metal roof systems. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. You can often see such examples of use over metal decks. 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.

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