Minum Pitch On A Steel Roof

Corrugated metal roofing has the same minimum pitch.

Minum pitch on a steel roof.

Panels joined with an applied lap sealant can go as low as 12. For low slope metal roofs under 12 that are nearly flat modified bitumen roofing thermoset and. 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. Anything above that will require you to put out higher cost because they are already considered as higher pitch.

The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot. Roof slope equivalents as rise. 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. That means there is at least 3 of vertical rise to the roof slope for every 12 it goes back horizontally.

The minimum pitch for metal roof shingles and lapped non soldered panels is 3 12. That is a 14 degree angle. The following table provides the minimum required. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope.

Most residential metal roofs require at least a 3 12 roof pitch and have no maximum roof pitch.