Minimum Roof Pitch Standing Seam Metal Roof

The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run.

Minimum roof pitch 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. The minimum slope for lapped non soldered seam metal roofs without applied lap sealant shall be three units vertical in 12 units horizontal 25 percent slope. In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. We require a 2 12 pitch for our standing seam products.

And profiles like standing seam which utilize a concealed connection to the roof deck require only a one and a half inch minimum pitch. Low slope metal roofs require less material which reduces the overall load on the building s structure. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

Typically large footprint single story. However there are many mechanically seamed standing seams that are very appropriate for lower pitch roofs usually down to about 1 4 12 most flat seam products will have soldered seams to make them watertight even on a flat roof. For a 1 12 pitch roof the only metal product i recommend is a mechanically seamed standing seam. 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. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. Pbr which is typically used for industrial metal buildings can be installed as low as half inch pitch for example. Snap lock standing seams should not be used on roofs under 1 5 or 2 12.

The minimum roof slope for metal roof panels depend on 3 different scenarios. You can often see such examples of use over metal decks. Thanks for your questions. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope.

This means for every 12 horizontal units the roof must rise a minimum of 3 vertical. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Also pitch is often expressed in a shorthand style using just the first number. Minimum metal roof slope depends on the roof profile building design climate and site location.