How To Get A Pitch On A Roof

Divide the slope by two to get the pitch.

How to get a pitch on a roof.

How to determine or calculate roof pitch or roof slope. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. The tools required will be a contractor s level at least 24 inches long and a tape measure. 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 maths behind this number is that it is the square root of rise run 2 1. The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed. Carpenters use special conversion charts to estimate the roofing material required based on the slope and shape. Measuring a roof pitch.

A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof gives the actual area of the roof. For more complex roofs you may need to calculate it section by section. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Also referred to as roof slope or roof slant so what does the 7 12 in the example to the right mean.

We get a 12 run with 5 3333 or 5 4 rise well that is our roof pitch 5 4 in 12. Ideally you will have safe access to your roof from inside the building. If not you will need to make your measurement from on top of the roof itself or at the edge of the roof with a ladder. How to measure roof pitch.

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. Here s an easy safe way to determine the pitch from inside your attic. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. For a roof with the ridge above one wall the span is the same as the run.

You can also calculate roof size using pitch without using the pythagorean theorem. The 7 means that the roof rises 7 for every 12 it runs. Roof pitch calculator is determined by the number of inches it rises vertically for every 12 inches it extends horizontally. Roof pitch is used to describe the slope or angle of the roof.

To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil.