Minimum Roof Pitch Standing Seam Metal Roof

For a 1 12 pitch roof the only metal product i recommend is a mechanically seamed standing seam.

Minimum roof pitch standing seam metal roof.

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. 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. According to the 2012 international building code 1507 4 2 deck slope minimum slopes for roof panels need to comply with the following. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope.

Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. Snap lock standing seams should not be used on roofs under 1 5 or 2 12. This means for every 12 horizontal units the roof must rise a minimum of 3 vertical. 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. 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 roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Also pitch is often expressed in a shorthand style using just the first number.

We require a 2 12 pitch for our standing seam products. In a few rare special occasions we might approve down to 1 5 12. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. The minimum roof slope for metal roof panels depend on 3 different scenarios.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Pbr which is typically used for industrial metal buildings can be installed as low as half inch pitch for example. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12.

You can often see such examples of use over metal decks. Minimum metal roof slope depends on the roof profile building design climate and site location. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. Low slope metal roofs require less material which reduces the overall load on the building s structure.