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 a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. 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. For a 1 12 pitch roof the only metal product i recommend is a mechanically seamed standing seam. Mbma classi fies metal roof systems into two types through fastener metal roof systems and standing seam metal roof systems.

Metal roof panels minimum roof slope roof pitch r905 10 2. The minimum roof slope for metal roof panels depend on 3 different scenarios. We require a 2 12 pitch for our standing seam products. 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. In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. In a few rare special occasions we might approve down to 1 5 12. You can often see such examples of use over metal decks.

For metal roof systems. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. 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.

This means for every 12 horizontal units the roof must rise a minimum of 3 vertical. 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.