Minimum Pitch Corrugated Plastic Roof

Allow a 1 minimum pitch per foot for adequate drainage.

Minimum pitch corrugated plastic roof.

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. In most occasions a pitch of three in twelve is preferred but this should also take into consideration the manufacturer s recommendations as well the unique condition of the corrugated metal roof. Pre notch rafters to compensate for slope. Corrugated metal roofing has the same minimum pitch.

However you can only use this pitch with built up roofing or specialized synthetic roofing. It is the recommended slope as there is no guarantee if you opt for flatter pitch than this. 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. Installing translucent plastic corrugated roof panels.

4 attach rafters to header and crossbeam with 1 screws and nails. Courtesy the kemlite company. The corrugated metal roof minimum slope is 5 degrees. Just like other metal roofs the minimum pitch for a corrugated metal roof largely depends on the profile of the roof.