Minimum Fall For Corrugated Iron Roof

Just like other metal roofs the minimum pitch for a corrugated metal roof largely depends on the profile of the roof.

Minimum fall for corrugated iron roof.

Corrugated roofing is a great material on traditional pitched roofs but it has severe limitations when the pitch gets below 5 degrees. Corrugated metal roofing has the same minimum pitch. The minimum slope for lapped non soldered seam metal roofs without applied lap sealant shall be three units vertical in 12 units horizontal 25 percent slope. Also pitch is often expressed in a shorthand style using just the first number.

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. According to the 2012 international building code 1507 4 2 deck slope minimum slopes for roof panels need to comply with the following. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.

The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.