Standing Seam Metal Roof Slope Minimum

In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12.

Standing seam metal roof slope minimum.

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. 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. The minimum pitch for shingles is 1 6 which is equivalent to 4 inches rise to 24 inches run. A lightweight roofing system also places fewer demands on a building s structural support system an important consideration in earthquake prone areas.

Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Mbma classi fies metal roof systems into two types through fastener metal roof systems and standing seam metal roof systems. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12.

The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. You can often see such examples of use over metal decks. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. For a 1 12 pitch roof the only metal product i recommend is a mechanically seamed standing seam.

According to the 2012 international building code 1507 4 2 deck slope minimum slopes for roof panels need to comply with the following. Standing seam roof systems must have a minimum roof slope of 1 4 12. In a few rare special occasions we might approve down to 1 5 12. 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. 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.