How Do You Determine Pitch On A Roof

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

How do you determine pitch on a roof.

For more complex roofs you may need to calculate it section by. For a roof with the ridge above one wall the span is the same as the run. How to calculate roof pitch. Rafter rise run from the pythagorean theorem.

Rise run pitch where pitch is expressed in percent. The slope is the same as the pitch. You ll need a level that is 12 or longer and a tape measure. Some levels have markings already and in this case you are ready to go unless you have a factory label that covers the 12 mark like we do.

To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. First enter the value of the rise and choose the unit of measurement from the drop down menu. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. First measure 12 inches from one end of the level and make a mark.

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. Make sure your have a 12 mark on your level. Here are the steps to follow for the roof angle calculator.

Then enter the value of the run and choose the unit of measurement from the drop down menu. Finally enter the value of the rafter length and. Here s an easy safe way to determine the pitch from inside your attic.