How Much Slope Do You Need For A Metal Roof

Most residential metal roofs require at least a 3 12 roof pitch and have no maximum roof pitch.

How much slope do you need for a metal roof. You need to consider the slope requirements of each panel to determine this minimum slope. As well a slope of 4 12 is most commonly considered the lowest slope for standard shingle installations. 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. 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.

The profile is the shape taken by the sheets when you bend them to form panels. The most common slopes are. Multiply the area by the slope. Since it s just over a deck if it had at least that much i probably wouldn t comment.

The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. The minimum slope of a roof depends on the roof s profile.

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. Slope is calculated as rise over run. Most roof s have a pitch in the 4 12 to 9 12 range. You can also estimate a roof pitch by eyeballing it from the ground from the gable side with a level and ruler.

Minimum slope for metal roof realistically any more than 1 4 per foot would okay at all but the most windy times. Learn more about finding the angle of a line using our slope calculator. 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. Divide the results by the number of 12 inch segments in your level.

For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12. That is a 14 degree angle. I ve built many of those patio covers over the years it rains a lot in oregon and they ve been fine. That means there is at least 3 of vertical rise to the roof slope for every 12 it goes back horizontally.

The result is the total square footage in your roofing project. 3 12 1 2 12 and 1 4 12.