Typical Roof Pitch Angle

Roof pitch degree table.

Typical roof pitch angle. Roof slope expressed as rise run in inches. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. Commonly it is 3 4 th of span as per gothic rafter must be equal to span. To put it in perspective the angle of this slope would be around 30 degrees.

High pitched roofs often need extra fasteners and their pitch can be as high as 21 12. Pitch angle incline slope they all can be used to refer to the steepness of a roof. An example for a steep sloped roof is 8 12. 0 or 180 0.

Common roof slopes expressed in rise run and angle slope expressed as grade. The way pitch also known as roof slope is measured is rise over run. Roof pitch and corresponding angles. The most commonly used roof pitches fall in a range between 4 12 and 9 12.

Roof slope expressed as an angle. Easy to walk on. Most roof s have a pitch in the 4 12 to 9 12 range. So if your roof rises 4 inches for every 12 inches of horizontal length then the pitch of your roof is expressed as 4 12.

3 12 1. 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. 4 76 8 33 grade. Greek says one must keep rafter length in range of 1 9 to 1 7 th of span but as per roman style the standard dimensions are kept about 1 3 to 2 9 th of span with an angle of 23 to 24 degree.

A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible. 0 12. Use the following formula which also describes a right triangle. They have a pitch ranging from 4 12 to 9 12.

This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. Usually average roof pitch is determined using the same roof length method. In the roofing trade the go to term is pitch and it is expressed in terms of 12 inches so the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally. Common roof pitches and equivalent grade degree and radian angles.

Pitches above 9 12 are very highly angled and are designated steep slope roofs. This means that the rise of the slope goes up or down 8 inches for every 12 inches. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs.