Minimum Slope Of Standing Seam Roof

Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope.

Minimum slope of standing seam roof.

Standing seam is the metal roof profile that has been gaining more popularity nowadays due to its clean and modern looks. That is a 14 degree angle. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. The minimum roof slope allowed by code for any type of roofis in 12 applicable only to coal tar pitch roof systems.

The following tableprovides the minimum required allowable roof slope for each type of roofing material mentioned in the code. In retrofit projects a sub framing system is attached to the existing flat roof surface to provide a minimum 12 roof pitch. A standing seam design assures adequate draining from rain and snow effectively eliminating ponding leaks and related problems typically associated with built up roofs. 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. Mbma recommends a minimum slope of 1 2 in 12 2 4 degrees for through fastener metal roof systems and 1 4 in 12 1 2 de grees for standing seam metal roof systems. You can often see such examples of use over metal decks. Mechanically seamed standing seam metal roofs commonly used on large warehouses and the like can be used on much lower roof pitches.

Minimum roof slope roof pitch r905 10 2 1. The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope.