Minimum Fall For Corrugated Iron Roof

The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run.

Minimum fall for corrugated iron roof.

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. Pbr which is typically used for industrial metal buildings can be installed as low as half inch pitch for example. Also pitch is often expressed in a shorthand style using just the first number. Corrugated roofing is a great material on traditional pitched roofs but it has severe limitations when the pitch gets below 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. Just like other metal roofs the minimum pitch for a corrugated metal roof largely depends on the profile of the roof. According to the 2012 international building code 1507 4 2 deck slope minimum slopes for roof panels need to comply with the following. Profiles with a higher ridge at the panel connections can be installed lower.

The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. 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.