How To Measure A Roof Pitch

Before taking any measurements you must first confirm that it s safe to walk on your roof.

How to measure a roof pitch. For more complex roofs you may need to calculate it section by. First measure 12 inches from one end of the level and make a mark. Position your level against the roof until the bubble of the vial sits between two lines. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.

One method to find the pitch is to climb on the roof and measure the rise for a 12. The slope is the same as the pitch. Roof pitch is often expressed as a ratio between rise and run in the form of x 12. Take the measurement of the vertical.

Take a measurement of 12 inches using a level. Check the surface of the. It can be assessed in two ways either as the angle the rafter makes with the horizontal or the proportion between the rise and the run of the roof. Measure from the attic.

How to calculate the pitch of a roof method one. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. If you are trying to learn how to measure roof pitch calculations accurately you should really consider the importance of using a calculator. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run.

For a roof with the ridge above one wall the span is the same as the run. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Another method to find the roof pitch is to go into the attic and measure the rise.

Roof pitch is simply the slopecreated by the rafter. 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. Measure from the roof. 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.

The underside of a barge rafter on a gable end. The underside of a rafter on a overhang at the bottom of the roof 3.