How To Get A Pitch On A Roof

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 get a pitch on a roof.

The slope is the same as the 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. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Carpenters use special conversion charts to estimate the roofing material required based on the slope and shape.

Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. 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.

Knowing the pitch of your roof is useful when designing an addition installing skylights or cutting new rake boards. You can also calculate roof size using pitch without using the pythagorean theorem. For a roof with the ridge above one wall the span is the same as the run. 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.

How to measure roof pitch. Measuring a roof pitch. The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed. We get a 12 run with 5 3333 or 5 4 rise well that is our roof pitch 5 4 in 12.

For more complex roofs you may need to calculate it section by section. Here s an easy safe way to determine the pitch from inside your attic. Divide the slope by two to get the pitch. Roof pitch is used to describe the slope or angle of the roof.

Also referred to as roof slope or roof slant so what does the 7 12 in the example to the right mean. The tools required will be a contractor s level at least 24 inches long and a tape measure. How to determine or calculate roof pitch or roof slope. There is a table of multipliers for each roof pitch which were derived using the pythagorean theorem.

Ideally you will have safe access to your roof from inside the building.