Pitched Roof Slope Angle

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.

Pitched roof slope angle.

You can also divide the rise over run multiply by 100 and get a percentage. A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible. A 4 12 pitch is around 18 5 degrees but not exactly. 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.

Roof pitch and corresponding angles. You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Pitch angle incline slope they all can be used to refer to the steepness of a roof.

Angle the angle of a roof is the same as the roof s slope except instead of being represented as x 12 it is represented in degrees. Roof pitch refers to the slope which the rafter creates. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.