How Much Pitch Should A Metal Roof Have

Just like other metal roofs the minimum pitch for a corrugated metal roof largely depends on the profile of the roof.

How much pitch should a metal roof have. If the pitch of your roof is 6 inches per 2 inches the angle would be 26 5 degrees. The overall design of the roof matters and pitch is only one of its elements. Sheet metal panels install quickly and easily and can be done without professional assistance especially on low slope roofs and come in a much wider range of colors than other nearly flat roofing options. With an efficient drainage system and sturdy support flat roofed homes won t be prone to leaks.

Think of a classic addams family haunted house with its soaring peaks and you have a. Visually this roof appears flat. High slope roofs with many valleys can be vulnerable to water leakage into their many seams. 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.

Since most building codes require a pitch of at least one quarter inch per 12 inches you should anticipate that the angle of your roof will be at least 4 degrees. Standing seam metal roofs with mechanical lock systems to ward off leaks can be successfully and attractively installed on roofs with at least a slope of 1 in 12. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. It is a commercial rated roofing panel and works well for lean to shed roofs.

Low slope roofs however aren t necessarily a structural liability. 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. One of the best metal roof profiles that is designed for use on low slope roofs is the pbr profile. It was fashionable for modern style homes built in the 1960s to have little pitch just a barely negligible slope to help drain water.

The most common slopes are. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. Different manufactures have different ratings for the pbr design but most are around 1 in 12. Profile in the context of metal roofing means the shape that the sheet of metal is bent into to form the panels.

In roofing it is expressed in inches of vertical rise over inches of horizontal run. A 4 12 pitch being 4 inches of vertical rise over one foot or 12 inches of horizontal run. 3 12 1 2 12 and 1 4 12. There are advantages and disadvantages to having a steep pitch versus a shallow or low pitch the most obvious of which is the roof s ability to shed or withstand heavy snow rain or wind.

Roofs on victorian era houses were often sharply angled with a steep pitch.