What Is The Minimum Pitch For A Standing Seam Metal Roof

Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12.

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

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. Pbr which is typically used for industrial metal buildings can be installed as low as half inch pitch for example. In a few rare special occasions we might approve down to 1 5 12. What is the minimum pitch for a zinc roof.

Also pitch is often expressed in a shorthand style using just the first number. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. And profiles like standing seam which utilize a concealed connection to the roof deck require only a one and a half inch minimum pitch. In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12.

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. Modified bitumen roofing requires a minimum roof pitch of 1 4 12 or greater. Thermoset and thermoplastic single ply roofing requires a minimum roof pitch of 1 4 12 or greater. For a 1 12 pitch roof the only metal product i recommend is a mechanically seamed standing seam.

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. You can often see such examples of use over metal decks. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. A 3 degree roof pitch means just over 50mm in every metre so over 3 metres you only have. We recommend 5 degrees however due to site conditions and execution.

Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered.