Roof Slope Angle Chart

Notes to the table above.

Roof slope angle chart.

The roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need. Some sources consider low slope to include 3 12 pitch roofs. Calculate the rafter length substituting these values into the following formula. Pitch rise run 1 5 6 25.

Then you ll be able to measure slope from an unfinished attic space under the roof. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. 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. Calculate the roof pitch as the proportion of rise and run.

Measure the rise of your roof. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. Low slope roofs are from 0 to 3 12 in pitch. If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks.

Roof pitch is a term describing how steep or flat your roof slope is. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. To obtain an accurate roof pitch measurement properly measure the rise and run. The combination of two numbers are used to display or show the roof pitch.

Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level. Whatever you decide to go with though finding the best roof pitch chart is going to be very important.