Minimum Slope Of Standing Seam Roof

A standing seam design assures adequate draining from rain and snow effectively eliminating ponding leaks and related problems typically associated with built up roofs.

Minimum slope of standing seam roof. You can often see such examples of use over metal decks. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope. Mechanically seamed standing seam metal roofs commonly used on large warehouses and the like can be used on much lower roof pitches. Standing seam is the metal roof profile that has been gaining more popularity nowadays due to its clean and modern looks.

The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope. Minimum roof slope roof pitch r905 10 2 1. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope. In retrofit projects a sub framing system is attached to the existing flat roof surface to provide a minimum 12 roof pitch.

The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. 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. That means there is at least 3 of vertical rise to the roof slope for every 12 it goes back horizontally. The minimum roof slope allowed by code for any type of roofis in 12 applicable only to coal tar pitch roof systems.

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. 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. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.