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.

Standing seam metal roofing is a particular type of metal roofing that raises the seams above the level of the roofing itself. You can often see such examples of use over metal decks. It s also described as having raised seams or vertical legs that rise above the level of the panel s flat area. 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.

The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope. 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. Mechanically seamed standing seam metal roofs commonly used on large warehouses and the like can be used on much lower roof pitches. 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.

Mbma recommends a minimum slope of 1 2 in 12 2 4 degrees for through fastener metal roof systems and 1. 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. Minimum slope requirements depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered. As you can see from illustration the roof changes pitch at the porch from a 9 12 to a 3 12 pitch.

Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. That is a 14 degree angle. 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. 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.

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