Minimum Slope For Corrugated Plastic Roof

Allow a 1 minimum pitch per foot for adequate drainage.

Minimum slope for corrugated plastic roof.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Courtesy the kemlite company. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. The corrugated metal roof minimum slope is 5 degrees.

However you can only use this pitch with built up roofing or specialized synthetic roofing. The most common disregard for engineering logic is the rule of minimum pitch for corrugated iron roofing. 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. Minimum pitch for corrugated metal roof.

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. The corrugated profile dates back to 1820 and it is the most used metal roof profile in the world. If you have a metal roof on your house there is a good chance that it is made of corrugated iron roofing. Corrugated roofing is an amazing choice for conventional pitched roof despite having the severe limitation about the pitch.

It is the recommended slope as there is no guarantee if you opt for flatter pitch than this. Pre notch rafters to compensate for slope.