Corrugated Metal Roof Minimum Slope

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.

Corrugated metal roof minimum slope.

Monday september 16 2019 the traditional metal roof types such as 5v crimp shown above and corrugated are rated by the manufacturers for use down to a 3 12 pitch three inches of vertical rise for every foot of horizontal run. 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. Typically large footprint single story warehouses and pre engineered metal buildings will utilize low slope metal roof systems. Low slope metal roofs require less material which reduces the overall load on the building s structure.

The minimum pitch for metal roof shingles and lapped non soldered panels is 3 12. Roof slope equivalents as rise. That is why all roofing manufacturers recommend the 5 degree pitch as the minimum slope and they will not provide any guarantees if it is installed flatter than this. Corrugated roofing is a great material on traditional pitched roofs but it has severe limitations when the pitch gets below 5 degrees.

Minimum metal roof slope depends on the roof profile building design climate and site location. For the most part the minimum pitch for metal roof installations depends on what kind of material you are installing and the method in which the material is being fastened. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. It is the recommended slope as there is no guarantee if you opt for flatter pitch than this.

What is the code required minimum pitch slope for a metal roof. With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels. The corrugated metal roof minimum slope is 5 degrees. The minimum slope for lapped non soldered seam metal roofs with applied lap sealant shall be one half unit vertical in 12 units horizontal 4 percent slope.

The following table provides the minimum required. Run in degrees and as percentage 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 roof slope for metal roofs is dependent upon the roof profile. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12.