Standing Seam Metal Roof Minimum Slope

Standing seam roof systems must have a minimum roof slope of 1 4 12.

Standing seam metal roof minimum slope. Modified bitumen roofing requires a minimum roof pitch of 1 4 12 or greater. In 12 0 25 in 12 1 19 built up roof coal tar pitch. Standing seam is the metal roof profile that has been gaining more popularity nowadays due to its clean and modern looks. 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 standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope. 18 43 asphalt shingles with special underlayment requirements 2 in 12. Minimum required roof slope for roofing materials. Mbma classi fies metal roof systems into two types through fastener metal roof systems and standing seam metal roof systems.

Mechanically seamed standing seam metal roofs commonly used on large warehouses and the like can be used on much lower roof pitches. Thermoset and thermoplastic single ply roofing requires a minimum roof pitch of 1 4 12 or greater. For example if your roof rose 8 inches for every 12 inches the roof pitch is 8 12. Using a measuring device move inward on the flat roof plane parallel to the ground 12 inches.

Roofing material or system. That means there is at least 3 of vertical rise to the roof slope for every 12 it goes back horizontally. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. That is a 14 degree angle.

You can often see such examples of use over metal decks. Minimum slope requirements depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered. 9 46 built up roof asphalt. The pitch is measured in inches of vertical rise per foot of horizontal run and the 5v crimp profile shown above requires a minimum slope of three in twelve or 3 12 3 inches vertically per 12 inches horizontally.

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 recommends a minimum slope of 1 2 in 12 2 4 degrees for through fastener metal roof systems and 1.