How Do I Figure Roof Pitch

Here s an easy safe way to determine the pitch from inside your attic.

How do i figure roof pitch.

In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. Homes and other buildings have roofs with slopes ranging from no slope or flat to very steep slopes. Check your results with the omni roof pitch calculator. 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.

Roof pitch refers to the amount of rise a roof has compared to the horizontal measurement of the roof called the run. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run. After measuring the slope estimate the roof pitch by dividing the slope by 2. 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.

Angle the angle of a roof is the same as the roof s slope except instead of being. 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. How to calculate the pitch of a roof. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.

A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. Find the inverse tangent of the pitch to find the angle in degrees. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Divide the first part of the ratio by 12 to work out the pitch.

How do you calculate a roof pitch. The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. How roof pitch is calculated.

Roof pitch calculator results explained. Before you calculate roof pitch you ll need to measure the slope of your roof. A 12 12 pitch roof has a pitch angle of 45. To convert between american roofing ratios and pitch degrees follow these steps.

It is often compared to slope but is not exactly the same. To accurately calculate the area of your roof you must first determine its slope or pitch. The easiest way to do this is by accessing a rafter in your attic if you can. Roof pitch is used to describe the slope or angle of the roof.

Often you express roof pitch as the ratio between the rise and the run in the form of. Roof pitch refers to the slope which the rafter creates.