What Is The Minimum Pitch For A Standing Seam Metal Roof

Modified bitumen roofing requires a minimum roof pitch of 1 4 12 or greater.

What is the minimum pitch for a standing seam metal roof. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. We recommend 5 degrees however due to site conditions and execution. Sig zinc and copper recommend that the minimum pitch for a standing seam zinc roof is five degrees with an absolute minimum of 3 degrees. The minimum slope for lapped non soldered seam metal roofs with applied lap sealant shall be one half unit vertical in 12 units horizontal 4 percent slope.

A standing seam design assures adequate draining from rain and snow effectively eliminating ponding leaks and related problems typically associated with built up roofs. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12. You can often see such examples of use over metal decks. Thermoset and thermoplastic single ply roofing requires a minimum roof pitch of 1 4 12 or greater.

The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. 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. A 3 degree roof pitch means just over 50mm in every metre so over 3 metres you only have 150mm to play with.

The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch 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. Profile in the context of metal roofing means the shape that the sheet of metal is bent into to form the panels. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

Standing seam is the metal roof profile that has been gaining more popularity nowadays due to its clean and modern looks. 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.