Corrugated Metal Roof Minimum Slope

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.

Corrugated metal roof minimum slope.

Corrugated roofing is an amazing choice for conventional pitched roof despite having the severe limitation about the pitch. Corrugated metal roofing has the same minimum pitch. Corrugated roofing is a great material on traditional pitched roofs but it has severe limitations when the pitch gets below 5 degrees. Minimum pitch for metal roof.

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

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 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. 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. Low slope metal roofs require less material which reduces the overall load on the building s structure.

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. 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. Typically large footprint single story warehouses and pre engineered metal buildings will utilize low slope metal roof systems. The minimum pitch for metal roof shingles and lapped non soldered panels is 3 12.

What is the code required minimum pitch slope for a metal roof. Minimum metal roof slope depends on the roof profile building design climate and site location. It is the recommended slope as there is no guarantee if you opt for flatter pitch than this. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope.