How Much Slope Does A Metal Roof Require In Arizona

Sheet metal panels install quickly and easily and can be done without professional assistance especially on low slope roofs and come in a much wider range of colors than other nearly flat roofing options.

How much slope does a metal roof require in arizona. 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 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. The majority of north american residential roofs have historically been constructed with a slope between about 4 12 and 9 12. Most metal roofs will have minimum pitches of three in twelve but this might sometimes go down depending on whether there are special installation procedures issued by the manufacturer regarding that particular roofing material.

Corrugated metal roofing has the same minimum pitch. This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.

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. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. Standing seam metal roofs with mechanical lock systems to ward off leaks can be successfully and attractively installed on roofs with at least a slope of 1 in 12. A handy roof slope estimator can help you determine if your roof slope is likely too low for shingles.

The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run.