Measuring Roof Pitch Angle

Now divide the rise by the multiplier to get the pitch eg.

Measuring roof pitch angle.

48 10 4 8. Take your pitch percent and press shift maybe 2nd function on your calculator then press tan and. First measure 12 inches from one end of the level and make a mark. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

It always makes sense to the standard roof pitch angle spot on as the benefits of doing so are quite obvious. The pitch of this roof is 4 8 12. Since pitch is the rise over a 12 inch run divide the run by 12 to get the multiplier in this case 120 12 10. The calculator above can handle much of this math.

Rafter height width from pythagoras remember that at school so. To convert between american roofing ratios and pitch degrees follow these steps. Find the inverse tangent of the pitch to find the angle in degrees. Divide the first part of the ratio by 12 to work out the pitch.

With the help of these roof pitch degree calculator programs you can make sure that your home is nice and balanced. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Divide the height of your roof by the width not the full width if you ve measured the full width wall to wall divide. Take the measurement of the vertical.

How to measure roof pitch to measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. 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. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. A 12 12 pitch roof has a pitch angle of 45.

For example if the roof rises 4 feet and the span is 16 feet twice the run then the pitch is 4 16 or 1 4. 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. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run. If you want to know how to find the pitch of a roof then start with a calculator.

Check the surface of the. Take a measurement of 12 inches using a level.