Minimum Sheet Metal Roof Slope

Asphalt shingles continue to be the most widely installed roof covering option in north america.

Minimum sheet metal roof slope.

The minimum pitch for. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope. Determine the minimum slope of the roof based on the roofing material. Low slope metal roofs require less material which reduces the overall load on the building s structure.

This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. The required roof slope varies with application of materials and use. 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.

The minimum roof slope for metal roofs is dependent upon the roof profile. The minimum roof slope for metal roof panels depend on 3 different scenarios. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. 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.

Match roof material and use appropriate slope match the roofing on the covered porch with the main roof. Minimum metal roof slope depends on the roof profile building design climate and site location. 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 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. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. The nrca roofing and waterproofing manual fifth edition states the mini mum slope for structural metal panel roof systems should be 1 2 in 12 2 4 degrees. The minimum roof slope requirement for metal panels varies depending on panel connection conditions.

To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. Typically large footprint single story. Profile in the context of metal roofing means the shape that the sheet of metal is bent into to form the panels.