Minimum Pitch For Corrugated Metal Roof

That is a 14 degree angle.

Minimum pitch for corrugated metal 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. Corrugated metal roofing has the same minimum pitch. Because of the shallow height of the undulating ridges of the 5v and corrugated profiles and the use of exposed metal fasteners to screw the metal to the roof deck they are limited to a slope that will shed rain quickly. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. 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. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. The corrugated metal roof minimum slope is 5 degrees.

That is why all roofing manufacturers recommend the 5 degree pitch as the minimum slope and they will not provide any guarantees if it is installed flatter than this. That said if you want to have a metal roof that is worth its weight in value that doesn t come with a ton of problems the minimum pitch for metal roof applications should be kept at around at least a 3 1 2 12 three and a half on 12 or above. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. That means there is at least 3 of vertical rise to the roof slope for every 12 it goes back horizontally.

It is the recommended slope as there is no guarantee if you opt for flatter pitch than this. Corrugated roofing is an amazing choice for conventional pitched roof despite having the severe limitation about the pitch. Even though manufacturers say 1 4 12 is acceptable. Minimum pitch for corrugated metal roof.

Corrugated roofing is a great material on traditional pitched roofs but it has severe limitations when the pitch gets below 5 degrees.