How Do I Determine The Pitch Of My Roof

How to measure roof pitch.

How do i determine the pitch of my roof.

For example if you used a 24 inch level and your measurement was 12 inches the pitch in your roof is 6 in 12. Here are the steps to follow for the roof angle calculator. Divide the results by the number of 12 inch segments in your level. For more on calculating roof pitch and understanding how pitch and slope are different read on.

Pitch is the incline of the roof represented as the ratio of rise to the span twice the run. Also referred to as roof slope or roof slant so what does the 7 12 in the example to the right mean. It can be assessed in two ways either as the angle the rafter makes with the horizontal or the proportion between the rise and the run of the roof. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.

To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. First measure 12 inches from one end of the level and make a mark. Roof pitch calculator is determined by the number of inches it rises vertically for every 12 inches it extends horizontally. 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.

You can also estimate a roof pitch by eyeballing it from the ground from the gable side with a level and ruler. 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. First enter the value of the rise and choose the unit of measurement from the drop down menu. Place the end of your level the 0 inch point of your 12 marking against the roof surface.

This is the amount your roof inclines in a 1 foot span or the pitch of your roof. After measuring the slope estimate the roof pitch by dividing the slope by 2 if you have a simple gable roof. If you can t get to your attic you can measure slope on your rooftop as long as it s safe to go up there. One method to find the pitch is to climb on the roof and measure the rise for a 12 run.

Then enter the value of the run and choose the unit of measurement from the drop down menu. Roof pitch is often expressed as a ratio between rise and run in the form of x 12. Roof pitch is simply the slopecreated by the rafter. The 7 means that the roof rises 7 for every 12 it runs.

However if you have a more complex roof you may need to calculate pitch section by section.