Even though manufacturers say 1 4 12 is acceptable.
Recommended pitch for metal roof.
So let s say a roof rises 6 inches for every 12 inches in depth towards the peak.
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.
Just like other metal roofs the minimum pitch for a corrugated metal roof largely depends on the profile of the roof.
Profile in the context of metal roofing means the shape that the sheet of metal is bent into to form the panels.
Standard roof pitches typically ranging between 1 12 and 5 12.
The roof pitch would be described as a 6 12 pitch.
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.
Any roof pitch higher than a 5 12 requires custom engineering which might increase the cost of your building.
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.
For pitches of 2 5 12 up to 4 12 the roof requires double underlayment.
Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle.
You could also opt for a pvc flat roofing membrane.
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 minimum pitch for metal roofing varies depending on the profile of the metal.
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.
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.
The primary reason roof pitch exists in the first place is to redirect water.
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.
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.
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.
