How To Check Roof Pitch

Often you express roof pitch as the ratio between the rise and the run in the form of x 12.

How to check roof pitch.

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. Working from the interior side of the roof you ll need access to a roof rafter to measure the pitch. The pitch of the roof is read where the bottom of the rafter crosses this scale. The slope is the same as the pitch.

For more complex roofs you may need to calculate it section by. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. Some levels have markings already and in this case you are ready. Let s say it is equal to 1 5 m.

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. Place the level horizontally along the rafter until it contacts the roof sheathing avoiding any protruding roof nails. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally.

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. How to determine or calculate roof pitch or roof slope 1. The underside of a barge rafter on a gable end.

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. How to determine your roof pitch the easy way step 1. Climb on the roof and measure. Roof pitch is used to describe the slope or angle of the roof.

Measure the rise of your roof. The underside of a rafter on a overhang at the bottom of the roof 3. Pitch rise run 1 5 6 25. If you need to find the pitch of an existing roof all you need is a level and a tape measure.

Calculate the roof pitch as the proportion of rise and run. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. First measure 12 inches from one end of the level and make a mark.