15 Degrees Roof Pitch

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.

15 degrees roof pitch.

This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. However if you to do the process using your own knowledge you can still convert pitch to degrees by dividing the rise and run and get its corresponding measurement. If you want to find the roof pitch in the form of x 12 simply calculate the pitch and substitute 12 for the run length. 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.

Drag sliders to animate the results and diagram. The 30 degree 7 12 roof recommendation is backed up by testing according to the publication science daily. With the use of this converter it will be easier for you to locate a 30 degree roof pitch 20 degree roof pitch 25 degree roof pitch or a 15 degree roof pitch. 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.

The value displayed as the rise will be your x. It is uncommon to find a roof below 15 but for those very low pitch applications there are interlocking clay pantiles available suitable for use down to 12 5. Other than the 45 roof slope which is 12 in 12 none of the standard roof pitches 5 in 12 6 in 12 etc are equal to a whole degree. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

The triangle diagram will be re drawn to scale with all dimensions marked. 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. The table below shows common roof pitches and the equivalent grade degrees and radians for each. Enter run the flat level length then click pitch angle or rise to select then enter other known dimension angle or pitch.

After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. Pitch tan angle where angle is the roof pitch expressed in degrees. Steeper slopes increase the sail effect that makes them susceptible to wind.