Recommended Pitch For Metal Roof

The metal roof minimum slope doesn t stray far from other building with different material.

Recommended pitch for metal roof.

You could also opt for a pvc flat roofing membrane. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. So let s say a roof rises 6 inches for every 12 inches in depth towards the peak. 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 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 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. 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. Any roof pitch higher than a 5 12 requires custom engineering which might increase the cost of your building.

The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot. Standard roof pitches typically ranging between 1 12 and 5 12. Slopes above 19 12 are not recommended since tiles on very steep roofs can rattle. The roof pitch would be described as a 6 12 pitch.

Profile in the context of metal roofing means the shape that the sheet of metal is bent into to form the panels. 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. Even though manufacturers say 1 4 12 is acceptable. 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. 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. 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. Just like other metal roofs the minimum pitch for a corrugated metal roof largely depends on the profile of the roof.

For pitches of 2 5 12 up to 4 12 the roof requires double underlayment. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.