Standard Roof Pitches Us

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Standard roof pitches us.

If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks. Most roof s have a pitch in the 4 12 to 9 12 range. 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. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled.

If you want to build a shed garage or other similar type of building then 4 to 6 is a preferable pitch type. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. Low slope roofs are from 0 to 3 12 in pitch. An average person can easily and safely walk upon these roofs without need of additional equipment.

On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. Most roofs in america follow these dimensions where pitch range is kept between 3 to 7 1 2. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. Pitches above 9 12 are very highly angled and are designated steep slope roofs.

See low slope roofing. For example when the roof is denoted by six and twelve that means a roof that rises six inches each twelve level inches. The combination of two numbers are used to display or show the roof pitch. If a roof increases in height by four inches for every foot of horizontal run it is considered to have a 4 in 12 pitch or just a 4 pitch talk in terms of pitches and you will always be understood in the roofing universe.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. When it is called four and twelve roofs that mean a roof that rises four inches each twelve level inches. Some sources consider low slope to include 3 12 pitch roofs. The most commonly used roof pitches fall in a range between 4 12 and 9 12.