How To Know Which Way To Pitch A Roof

So let s say a roof rises 6 inches for every 12 inches in depth towards the peak.

How to know which way to pitch a roof.

First measure 12 inches from one end of the level and make a mark. Hold the level straight and level bubble centered and then measure the vertical distance down from the your 12 mark on the level down to the roof. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.

On the roof hold the level perfectly level and measure the height from the roof to the level 12 inches away from where the level touches the surface this will be the rise. You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. This will allow your project to carry the depth and detail in the roof that you wanted as well as make sure that it will maintain a sturdy and effective nature throughout. You ll need a level that is 12 or longer and a tape measure.

This is the amount your roof inclines in a 1 foot span or the pitch of your roof. How to determine or calculate roof pitch or roof slope. One method to find the pitch is to climb on the roof and measure the rise for a 12 run. Even if you want to use a flat roof pitch calculator system you will be able to find one.

The slope is the same as the 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. Divide the slope by two to get the pitch. Calculate the roof pitch as the proportion of rise and run.

Angle arctan pitch arctan 0 25 14. Also referred to as roof slope or roof slant so what does the 7 12 in the example to the right mean. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. Pitch rise run 1 5 6 25.

The 7 means that the roof rises 7 for every 12 it runs. Roof pitch refers to the slope which the rafter creates. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. If you want to know how to find the pitch of a roof then start with a calculator.

The pitch of your roof is determined by the measurement of the vertical rise by the horizontal run. That is to say the roof pitch expressed as a ratio tells you how many inches the roof rises for every 12 inches of depth. Recalculate this value into an angle. Often you express roof pitch as the ratio between the rise and the run in the form of x 12.

Finally you can find the roof pitch in the form of x 12. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Place the end of your level the 0 inch point of your 12 marking against the roof surface.