Recommended Pitch For Metal Roof

There are some standing seam metal roofing options available from atas and other manufacturers that can be installed on a roof with pitch of 1 12.

Recommended pitch for metal roof.

You could also opt for a pvc flat roofing membrane. The minimum slope for lapped non soldered seam metal roofs with applied lap sealant shall be one half unit vertical in 12 units horizontal 4 percent slope. So if you do not need a certain exterior aesthetic or higher clearance in the interior of your metal building choosing a lower roof pitch will be more budget friendly option. That is to say the roof pitch expressed as a ratio tells you how many inches the roof rises for every 12 inches of depth.

For pitches of 2 5 12 up to 4 12 the roof requires double underlayment. 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. So you would need to pick the right option as most regular standing seam metal roofs will require a roof pitch of 2 12 or even 3 12 at a minimum. Just like other metal roofs the minimum pitch for a corrugated metal roof largely depends on the profile of the roof.

The primary reason roof pitch exists in the first place is to redirect water. 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. So let s say a roof rises 6 inches for every 12 inches in depth towards the peak. Profile in the context of metal roofing means the shape that the sheet of metal is bent into to form the panels.

The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot. 2 5 12 to 19 12 pitches clay or cement tiles can be used on a wide range of roof pitches. The metal roof minimum slope doesn t stray far from other building with different material. Standard roof pitches typically ranging between 1 12 and 5 12.

The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Even though manufacturers say 1 4 12 is acceptable. Any roof pitch higher than a 5 12 requires custom engineering which might increase the cost of your building. The roof pitch would be described as a 6 12 pitch.

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 following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.