What Is The Minimum Pitch For A Standing Seam Metal Roof

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.

What is the minimum pitch for a standing seam metal roof. Also pitch is often expressed in a shorthand style using just the first number. Standing seam roof systems must have a minimum roof slope of 1 4 12. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.

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. Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more.

Modified bitumen roofing requires a minimum roof pitch of 1 4 12 or greater. A 3 degree roof pitch means just over 50mm in every metre so over 3 metres you only have. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. 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. 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. We require a 2 12 pitch for our standing seam products.

The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. 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 roll roofing is 2 12 or 2 inches rise to 12 inches run.

Pbr which is typically used for industrial metal buildings can be installed as low as half inch pitch for example.