Steel Shingle Roof Minimum Slope

A minimum pitch of 3 in 12 or even 4 in 12 will normally be required.

Steel shingle roof minimum slope. Typically large footprint single story. The pitch is measured in inches of vertical rise per foot of horizontal run and the 5v crimp profile shown above requires a minimum slope of three in twelve or 3 12 3 inches vertically per 12 inches horizontally. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. Minimum pitch for metal roof.

Suitable materials for pitched roofs. With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels. This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. 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 roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. 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. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.

Asphalt shingles continue to be the most widely installed roof covering option in north america. The minimum roof slope for metal roofs is dependent upon the roof profile. Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Low slope metal roofs require less material which reduces the overall load on the building s structure. Metal roof shingles minimum roof slope roof pitch r905 4 2. Keep in mind that neither metal shingles not corrugated metal panels are suitable options for low slope or nearly flat roofs.

Corrugated metal roofing has the same minimum pitch. Pitched roofs begin with with slopes greater than 3 in 12. 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. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope.