How To Tell The Pitch Of A Roof

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How to tell the pitch of a roof.

Some carpenters consider it more correct to use the term slope for the steepness and use pitch to describe the roof s overall dimensions. Roof pitch is used to describe the slope or angle of the roof. 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. Example a the measurements are taken from on top of the roof.

When you need to determine your roof pitch all you need is a bubble level and a tape measure. Check your results with the omni roof pitch calculator. Find the inverse tangent of the pitch to find the angle in degrees. A 12 12 pitch roof has a pitch angle of 45.

Most people use it to mean the steepness of the roof. 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. The term pitch has two different meanings when it comes to roofs.

How to measure roof pitch. The level should be at least 12 long. Make sure your have a 12 mark on your level. Knowing the pitch of your roof is useful when designing an addition installing skylights or cutting new rake boards.

To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. The 7 means that the roof rises 7 for every 12 it runs. Simply mark a level at 12 hold it perfectly level and measure from the roof surface to your 12 mark this.

The example to right shows 2 different ways to determine or calculate roof pitch also called roof slope. Divide the first part of the ratio by 12 to work out the pitch.