Figuring 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.

Figuring roof pitch.

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. Homes and other buildings have roofs with slopes ranging from no slope or flat to very steep slopes. Knowing the pitch of your roof is useful when designing an addition installing skylights or cutting new rake boards. How to calculate roof pitch.

Roof pitch refers to the slope which the rafter creates. Generally roof pitch is calculated from the same formula that describes a right triangle. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. How do you calculate a roof pitch.

Rafter rise run from the pythagorean theorem. Roof pitch is used to describe the slope or angle of the roof. Angle the angle of a roof is the same as the roof s slope except instead of being. How to measure roof pitch.

The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed. How to calculate the pitch of a roof. You can use the following equations to find the length of the rafter and the slope. Before you calculate roof pitch you ll need to measure the slope of your roof.

Rise run pitch where pitch is expressed in percent. Often you express roof pitch as the ratio between the rise and the run in the form of. Here s an easy safe way to determine the pitch from inside your attic. 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 this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.