How To Work Out Your Roof Pitch

Before taking any measurements you must first confirm that it s safe to walk on your roof.

How to work out your roof pitch. You ll need a level that is 12 or longer and a tape measure. The slope is the same as the pitch. Take the measurement of the vertical. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.

For a roof with the ridge above one wall the span is the same as the run. This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. Check the surface of the. Pitch rise run 1 5 6 25.

To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. Calculate the rafter length substituting these values into the following formula. Position your level against the roof until the bubble of the vial sits between two lines.

Take a measurement of 12 inches using a level. Let s say it is equal to 1 5 m. Naturally this does not go down particularly well without the right tools knowledge and assistance. For more complex roofs you may need to calculate it section by.

Calculate the roof pitch as the proportion of rise and run. Roof pitch calculator results explained slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run. Measure the rise of your roof. 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 measure 12 inches from one end of the level and make a mark.