How To Measure A Roof Pitch

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

How to measure a roof pitch.

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. First measure 12 inches from one end of the level and make a mark. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Position your level against the roof until the bubble of the vial sits between two lines.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. 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. The slope is the same as the pitch. Roof pitch is simply the slopecreated by the rafter.

Roof pitch is often expressed as a ratio between rise and run in the form of x 12. For more complex roofs you may need to calculate it section by. Before taking any measurements you must first confirm that it s safe to walk on your roof. The underside of a barge rafter on a gable end.

Take a measurement of 12 inches using a level. How to calculate the pitch of a roof method one. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. Another method to find the roof pitch is to go into the attic and measure the rise.

Measure from the roof. Measure from the attic. 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. Check the surface of the.

One method to find the pitch is to climb on the roof and measure the rise for a 12. Take the measurement of the vertical. If you are trying hard to work out how to figure roof pitch measurements the calculator takes away all of those problems for you more or less instantly. Pitch is the incline of the roof represented as the ratio of rise to the span twice the run.

How to determine or calculate roof pitch or roof slope 1. For a roof with the ridge above one wall the span is the same as the run.