Measuring Roof Pitch

For a roof with the ridge above one wall the span is the same as the run.

Measuring roof pitch.

For more complex roofs you may need to calculate it section by. If the pitch is 1 3 the slope is 8 12. How to calculate the pitch of a roof method one. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio.

Measure from the roof. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Using ruler and tape you can do it anyway of these ways. Placing a ladder near the roof you will put a level a foot or so up on the roof hold it level and measure from the.

And pitch is a fraction derived by dividing the rise by the entire span. Slope minimums for various roof coverings. Measure from the attic. Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials.

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. One method to find the pitch is to climb on the roof and measure the rise for a 12. Remember slope is expressed as a ratio and in inches per foot. Another method to find the roof pitch is to go into the attic and measure the rise.

First measure 12 inches from one end of the level and make a mark. If the slope is 4 12 the pitch for the 24 foot span is 1 6.