Roof Slope Pitch Angle

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 slope pitch angle.

Rise run rise run slope. First convert the pitch to a slope. To do this simply convert the rise and run as a fraction to a decimal form eg. 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.

This forms an angle of 18 5 between the horizontal section and the roof and creates a gentle incline that is seen as a midpoint between a low pitch and medium pitch roof. Roof pitch angle and slope factor charts. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across. This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.

The combination of two numbers are used to display or show the roof pitch. Squaring building lines example 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. 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. Roof pitch is a term describing how steep or flat your roof slope is.

To find the angle of a roof in degrees convert the pitch to a slope then convert to degrees by finding the arc tangent of the slope. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.