Minimum Slope For Standing Seam Metal Roof

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.

Minimum slope for standing seam metal roof.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Standing seam roof systems must have a minimum roof slope of 1 4 12. Mbma classi fies metal roof systems into two types through fastener metal roof systems and standing seam metal roof systems.

In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12. For metal roof systems. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12.

The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. 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 4 in 12 1 2 de grees for standing seam metal roof systems. 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.

The minimum slope for lapped non soldered seam metal roofs without applied lap sealant shall be three units vertical in 12 units horizontal 25 percent slope.