Standing Seam Metal Roof Minimum Slope

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

Standing seam metal roof minimum slope.

The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope. Standing seam is the metal roof profile that has been gaining more popularity nowadays due to its clean and modern looks. 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.

For example if your roof rose 8 inches for every 12 inches the roof pitch is 8 12. Once you reach 12 inches mark it and then measure how far the roof rises perpendicular to the ground. Thermoset and thermoplastic single ply roofing requires a minimum roof pitch of 1 4 12 or greater. Roofing material or system.

Minimum required roof slope for roofing materials. Mechanically seamed standing seam metal roofs commonly used on large warehouses and the like can be used on much lower roof pitches. That is a 14 degree angle. Standing seam roof systems must have a minimum roof slope of 1 4 12.

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. Using a measuring device move inward on the flat roof plane parallel to the ground 12 inches. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. 18 43 asphalt shingles with special underlayment requirements 2 in 12.

That means there is at least 3 of vertical rise to the roof slope for every 12 it goes back horizontally. Modified bitumen roofing requires a minimum roof pitch of 1 4 12 or greater. 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. In 12 0 25 in 12 1 19 built up roof coal tar pitch.

Corrugated metal roofing has the same minimum pitch. Minimum required slope x in 12 minimum required slope degrees asphalt shingles.