How To Measure Roof Pitch In Attic

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.

How to measure roof pitch in attic.

You are able to measure a roof pitch either from the rafter within the attic a rafter s overhang in the roof or a barge rafter that is alongside the gable. For more complex roofs you may need to calculate it section by. 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. If you can t measure the roof then the next best method is to estimate the roof surface area.

Roof pitch is simply the slopecreated by the rafter. 8 inches and you have an 8 in 12 pitch. Using ruler and tape you can do it anyway of these ways. It can be assessed in two ways either as the angle the rafter makes with the horizontal or the proportion between the rise and the run of the roof.

On a ladder at the walled part of the pitched roof place the level against the roof overhang rafter with the 12 inch. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof. The slope is the same as the pitch.

Outside of the u s a degree angle is typically used. First measure 12 inches from one end of the level and make a mark. Place an ending of carpenter s level such that it touches the underneath of the rafter and regulate till the bubble s centered amid the two lines. Fortunately if you know the roof s pitch or have access to the home s attic to measure its incline you can arrive at an accurate roof area calculation using sketchandcalc.

Once the footprint is determined then you will multiply this number by a pitch factor between 1 2 1 5 depending on the pitch or steepness of the roof. If this distance measures 4 inches you have a 4 in 12 pitch. The key to this method is to determine the footprint of the attic. You want a roof area calculator that provides accurate estimates to help you order materials such as shingles membrane roofing or ceramic tile.

Pitch measurement method 1. Roof pitch is often expressed as a ratio between rise and run in the form of x 12. 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.