How To Check A Roof Pitch

To find the angle of a roof in degrees convert the pitch to a slope then convert to degrees by finding the arc tangent of the slope.

How to check a roof pitch.

Measure the rise of your roof. The slope is the same as the pitch. The underside of a rafter in the attic. The underside of a barge rafter on a gable end.

How to determine or calculate roof pitch or roof slope 1. First convert the pitch to a slope. For a roof with the ridge above one wall the span is the same as the run. Pitch rise run 1 5 6 25.

How to determine your roof pitch the easy way step 1. Rise run rise run slope. Place the level horizontally along the rafter until it contacts the roof sheathing avoiding any protruding roof nails. If you need to find the pitch of an existing roof all you need is a level and a tape measure.

You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. Some levels have markings already and in this case you are ready. Calculate the rafter length substituting these values into the following formula. The underside of a rafter on a overhang at the bottom of the roof 3.

Working from the interior side of the roof you ll need access to a roof rafter to measure the pitch. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally.

Climb on the roof and measure. Let s say it is equal to 1 5 m. For more complex roofs you may need to calculate it section by. Roof pitch refers to the slope which the rafter creates.

Often you express roof pitch as the ratio between the rise and the run in the form of x 12. To do this simply convert the rise and run as a fraction to a decimal form eg. Calculate the roof pitch as the proportion of rise and run.