Standing Seam Metal Roof 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 slope. This is particularly important to pay attention to when using metal roofing products such as standing seam metal which have a multitude of profiles attachment methods and seam lap joint styles which can affect the recommended slope. You can often see such examples of use over metal decks. Standing seam metal roofing is a particular type of metal roofing that raises the seams above the level of the roofing itself. If roofing material is installed on a roof with a slope that is less than what is specified by the manufacturer it will void the warranty.

Standing seam metal roofing is defined as a concealed fastener metal panel system that features vertical legs and a broad flat area between the two legs. Standing seam is the metal roof profile that has been gaining more popularity nowadays due to its clean and modern looks. Mbma recommends a minimum slope of 1 2 in 12 2 4 degrees for through fastener metal roof systems and 1. By the way pitch is measured by picking any point on the roof place a level on it measure 12 out from that point this is called the run and then down to the roof surface from the bottom of the level this is called the rise to see how many inches the roof pitches over 12.

Mechanically seamed standing seam metal roofs commonly used on large warehouses and the like can be used on much lower roof pitches. 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. Continuous panels run from the ridge of the roof down to the eaves. That is a 14 degree angle.

As you can see from illustration the roof changes pitch at the porch from a 9 12 to a 3 12 pitch. 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. That means there is at least 3 of vertical rise to the roof slope for every 12 it goes back horizontally. The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope.

Houses in your neighborhood with metal roofs most likely are of the standing seam variety.