Minimum Slope For Corrugated Plastic Roof

Installing translucent plastic corrugated roof panels.

Minimum slope for corrugated plastic roof.

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. The most common disregard for engineering logic is the rule of minimum pitch for corrugated iron roofing. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. It is the recommended slope as there is no guarantee if you opt for flatter pitch than this.

Minimum pitch for corrugated metal roof. Corrugated roofing is an amazing choice for conventional pitched roof despite having the severe limitation about the pitch. The corrugated metal roof minimum slope is 5 degrees. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

Just like other metal roofs the minimum pitch for a corrugated metal roof largely depends on the profile of the roof. Allow a 1 minimum pitch per foot for adequate drainage. Pre notch rafters to compensate for slope. Courtesy the kemlite company.

The corrugated profile dates back to 1820 and it is the most used metal roof profile in the world. However you can only use this pitch with built up roofing or specialized synthetic roofing.