How To Determine The Pitch Of Your Roof

Position your level against the roof until the bubble of the vial sits between two lines.

How to determine the pitch of your roof.

For more complex roofs you may need to calculate it section by. Also referred to as roof slope or roof slant so what does the 7 12 in the example to the right mean. Climb on the roof and measure. How to calculate roof pitch.

To determine the y height measure from the bird s mouth up the calculated slope x in 12 to the top of the rafter. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. The slope is the same as the pitch. The roof pitch is the slope of the rafter.

Even if you want to use a flat roof pitch calculator system you will be able to find one. Roof pitch calculator is determined by the number of inches it rises vertically for every 12 inches it extends horizontally. The pitch is commonly defined as the ratio of rise over run in the form of x 12. Before taking any measurements you must first confirm that it s safe to walk on your roof.

If you want to know how to find the pitch of a roof then start with a calculator. How to measure roof pitch to measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. For example if a roof has a pitch of 4 12 then for every 12 inches the building extends horizontally it rises 4 inches. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally.

Take a measurement of 12 inches using a level. The 7 means that the roof rises 7 for every 12 it runs. The rise is the height of the roof and the run is the horizontal span as pictured above. First measure 12 inches from one end of the level and make a mark.

Rafter rise run from the pythagorean theorem. Rise run pitch where pitch is expressed in percent. Some levels have markings already and in this case you are ready. Take the measurement of the vertical.

Check the surface of the. The top of the ridge beam m y. For a roof with the ridge above one wall the span is the same as the run. Make sure your have a 12 mark on your level.

Pitch tan angle where angle is the roof pitch expressed in degrees. How to determine your roof pitch the easy way step 1.