Minimum Roof Slope For Standing Seam Metal Roof

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

Minimum roof slope for standing seam metal roof.

The minimum pitch for shingles is 1 6 which is equivalent to 4 inches rise to 24 inches run. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. You can often see such examples of use over metal decks. According to the 2012 international building code 1507 4 2 deck slope minimum slopes for roof panels need to comply with the following.

This means for every 12 horizontal units the roof must rise a minimum of 3 vertical. 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. We require a 2 12 pitch for our standing seam products. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.

Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope. Metal roof panels minimum roof slope roof pitch r905 10 2. 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. For metal roof systems.

In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. The minimum roof slope for metal roof panels depend on 3 different scenarios. Mbma classi fies metal roof systems into two types through fastener metal roof systems and standing seam metal roof systems. Typically low slope metal roof systems vary in weight from 40 to 135 pounds per 100 square feet making them among the lightest roofing products and the easiest to install.

A lightweight roofing system also places fewer demands on a building s structural support system an important consideration in earthquake prone areas. Mbma recommends a minimum slope of 1 2 in 12 2 4 degrees for through fastener metal roof systems and 1 4 in 12 1 2 de grees for standing seam metal roof systems. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more.