Metal Roof Drop Per Foot

Some building codes start at one quarter of an inch per foot or two percent.

Metal roof drop per foot.

You have more than enough slope for your roof however you will likely need some sort of membrane roofing since it is very low slope. 3 12 1 2 12 and 1 4 12. A roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. Panels are often measured in inches use our inches to feet conversion calculator to convert to feet.

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. Low slope metal roofs require less material which reduces the overall load on the building s structure. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. However minimum slope for a flat roof by building code here is 2.

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. The minimum pitch for metal roofing varies depending on the profile of the metal. Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12. It s a good idea to order an extra 10 to account for cutoffs and waste material.

Finally divide the square footage of the roof by the square footage of the metal roofing panel to find the number of panels needed for your roof. Low slope metal roofs have simple geometries and are easier and less expensive to install that medium to steep slope roofs. Sometimes pitch is also expressed in fraction form using a fraction with a slash such as 6 12. For budget conscious homeowners metal shingles will run about 7 to 10 per square foot installed while corrugated metal sheets can be installed for 3 50 to 5 50 per square foot for materials and labor.

There are profiled metal roof cladding systems specifically designed for low slope application. However an ideal roof drop per foot should be at least one eighth to one quarter of an inch per foot. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. Anything less than one eighth of an inch may pool on the roof.

The most common slopes are. Profile in the context of metal roofing means the shape that the sheet of metal is bent into to form the panels.