Corrugated Metal Roof Minimum Slope

The corrugated metal roof minimum slope is 5 degrees.

Corrugated metal roof minimum slope.

Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. Minimum pitch for metal roof. Corrugated metal roofing has the same minimum pitch. 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.

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. What is the code required minimum pitch slope for a metal roof. Corrugated roofing is an amazing choice for conventional pitched roof despite having the severe limitation about the pitch. With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels.

To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. The following table provides the minimum required. Typically large footprint single story warehouses and pre engineered metal buildings will utilize low slope metal roof systems. 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 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 roofing is a great material on traditional pitched roofs but it has severe limitations when the pitch gets below 5 degrees. The minimum pitch for metal roof shingles and lapped non soldered panels is 3 12. It is the recommended slope as there is no guarantee if you opt for flatter pitch than this.

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. Roof slope equivalents as rise. Minimum metal roof slope depends on the roof profile building design climate and site location. 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.