What Is The Minimum Pitch For A Standing Seam Metal Roof

We recommend 5 degrees however due to site conditions and execution.

What is the minimum pitch for a standing seam metal roof.

The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. In a few rare special occasions we might approve down to 1 5 12. Modified bitumen roofing requires a minimum roof pitch of 1 4 12 or greater. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run.

Thermoset and thermoplastic single ply roofing requires a minimum roof pitch of 1 4 12 or greater. 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. We require a 2 12 pitch for our standing seam products. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12.

The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope. Pbr which is typically used for industrial metal buildings can be installed as low as half inch pitch for example. Standing seam roof systems must have a minimum roof slope of 1 4 12. Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered.

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. Also pitch is often expressed in a shorthand style using just the first number. For a 1 12 pitch roof the only metal product i recommend is a mechanically seamed standing seam. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more.

You can often see such examples of use over metal decks. 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. And profiles like standing seam which utilize a concealed connection to the roof deck require only a one and a half inch minimum pitch. What is the minimum pitch for a zinc roof.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.