How To Figuer Pitch On Roof

One method to find the pitch is to climb on the roof and measure the rise for a 12 run.

How to figuer pitch on roof. Finally enter the value of the rafter length and. Rise run pitch where pitch is expressed in percent. 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. How to calculate roof pitch.

Here s an easy safe way to determine the pitch from inside your attic. First enter the value of the rise and choose the unit of measurement from the drop down menu. Rafter rise run from the pythagorean theorem. Pitch tan angle where angle is the roof pitch expressed in degrees.

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. Divide the slope by two to get the pitch. On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof. Then enter the value of the run and choose the unit of measurement from the drop down menu.

8 inches and you have an 8 in 12 pitch. First measure 12 inches from one end of the level and make a mark. 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. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Pitch is the incline of the roof represented as the ratio of rise to the span twice the run. You ll need a level that is 12 or longer and a tape measure. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. If you do need to calculate the pitch an estimate or shortcut is usually more practical than measuring the roof s overall dimensions.

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. If you want to know how to find the pitch of a roof then start with a calculator. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. If this distance measures 4 inches you have a 4 in 12 pitch.

Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Here are a couple examples.