How To Know Which Way To Pitch A Roof

This is the amount your roof inclines in a 1 foot span or the pitch of your roof.

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. 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. Pitch rise run 1 5 6 25. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally.

Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. Place the end of your level the 0 inch point of your 12 marking against the roof surface. For a roof with the ridge above one wall the span is the same as the run. Roof pitch refers to the slope which the rafter creates.

The 7 means that the roof rises 7 for every 12 it runs. 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. Finally you can find the roof pitch in the form of x 12. 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.

The slope is the same as the pitch. Calculate the roof pitch as the proportion of rise and run. How to determine or calculate roof pitch or roof slope. Angle arctan pitch arctan 0 25 14.

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. You ll need a level that is 12 or longer and a tape measure. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. 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.

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. First measure 12 inches from one end of the level and make a mark. Recalculate this value into an angle. Here s an easy safe way to determine the pitch from inside your attic.

Also referred to as roof slope or roof slant so what does the 7 12 in the example to the right mean. Roof pitch calculator is determined by the number of inches it rises vertically for every 12 inches it extends horizontally. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Divide the slope by two to get the pitch.

One method to find the pitch is to climb on the roof and measure the rise for a 12 run. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. The pitch of your roof is determined by the measurement of the vertical rise by the horizontal run.