How To Find Existing Roof Pitch

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.

How to find existing roof pitch.

Working from the interior side of the roof you ll need access to a roof rafter to measure the pitch. 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. Find the tangent of the angle tan angle.

Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. To convert from degrees to the american ratio. This gives you the pitch of the roof. 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. 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. The most precise way to find the roof s slope is by measuring it from the underside. This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.

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. Total height of building. Enter any pitch or fraction of pitch to find angle. Access one of the rafters then take the measurement this way.

A 30 roof pitch is roughly the same as a 7 12 roof pitch. The slope is the same as the pitch. First measure 12 inches from one end of the level and make a mark. This is our pitch calculator which will convert pitch to angle or angle to pitch for half degree roof slope calculations.

Use a level against the underside of the rafter you re measuring to get the most accurate value. Enter any angle or fraction of angle to find pitch. Locate the level s 12 inch mark.