You ll need a level that is 12 or longer and a tape measure.
How ot measure roof pitch.
The slope is the same as the pitch.
Calculate the rafter length substituting these values into the following formula.
How to determine or calculate roof pitch or roof slope 1.
For a roof with the ridge above one wall the span is the same as the run.
If you are trying to learn how to measure roof pitch calculations accurately you should really consider the importance of using a calculator.
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.
As aforementioned there is no standard pitch of a roof.
Express roof pitch as the ratio of the amount of the vertical rise of a roof or rise over the corresponding horizontal distance or run you write the pitch assuming a run of 12 inches thus the ratio would describe how much a roof rises for each foot of the run.
For more complex roofs you may need to calculate it section by.
The underside of a barge rafter on a gable end.
8 inches and you have an 8 in 12 pitch.
The underside of a rafter on a overhang at the bottom of the roof 3.
Pitch measurement method 1 1.
On the roof hold the level perfectly level and measure the height from the roof to the level 12 inches away from where the level touches the surface this will be the rise.
Roof pitch calculator results explained.
One method to find the pitch is to climb on the roof and measure the rise for a 12 run.
Pitch rise run 1 5 6 25.
Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m.
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.
Let s say it is equal to 1 5 m.
Measure the rise of your roof.
For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally.
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.
This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.
Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.
If this distance measures 4 inches you have a 4 in 12 pitch.
First measure 12 inches from one end of the level and make a mark.
