How Much Slope Does A Metal Roof Require In Arizona

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.

How much slope does a metal roof require in arizona.

To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. Mineral surfaced roll roofing minimum roof slope roof pitch r905 5 2. A handy roof slope estimator can help you determine if your roof slope is likely too low for shingles. 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.

The majority of north american residential roofs have historically been constructed with a slope between about 4 12 and 9 12. 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. Roofs at the lower end of the range about 4 12 to 6 12 are relatively easy to walk and work on. Metal roof shingles can only be installed on roof slopes of 3 12 or greater 25 slope.

The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. 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.

Corrugated metal roofing has the same minimum pitch.