How Much Slope Do You Need For A Metal Roof

That is a 14 degree angle.

How much slope do you need for a metal roof.

Divide the results by the number of 12 inch segments in your level. Multiply the area by the slope. Most residential metal roofs require at least a 3 12 roof pitch and have no maximum roof pitch. Learn more about finding the angle of a line using our slope calculator.

Since it s just over a deck if it had at least that much i probably wouldn t comment. The most common slopes are. I ve built many of those patio covers over the years it rains a lot in oregon and they ve been fine. As well a slope of 4 12 is most commonly considered the lowest slope for standard shingle installations.

Express the slope of a metal roof by a ratio which indicates the pitch of the roof. Most metal roofs will have minimum pitches of three in twelve but this might sometimes go down depending on whether there are special installation procedures issued by the manufacturer regarding that particular roofing material. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. The profile is the shape taken by the sheets when you bend them to form panels.

The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. That means there is at least 3 of vertical rise to the roof slope for every 12 it goes back horizontally. Most roof s have a pitch in the 4 12 to 9 12 range. Minimum slope for metal roof realistically any more than 1 4 per foot would okay at all but the most windy times.

Most manufacturer and industry recommendations require or at the very least recommend special underlayment or other considerations on roofs between 2 12 and 4 12. The minimum slope of a roof depends on the roof s profile. Metal roof slope is expressed by a ratio indicating the roof pitch which notes the vertical rise of the roof in inches for every 12 inches the roof runs horizontally in other words dividing the vertical rise and its horizontal span. The result is the total square footage in your roofing project.

Common roof pitches and equivalent grade degree and radian angles. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. For example if the vertical height was 6 inches your slope would be 6 12 or 6 12 or 0 5 expressed as a decimal. 3 12 1 2 12 and 1 4 12.

A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. You need to consider the slope requirements of each panel to determine this minimum slope.