Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.
How do satellite roof measurements determine pitch.
Here s an easy safe way to determine the pitch from inside your attic.
Measure from satellite aerial drone blueprint images.
Roof pitch refers to the slope which the rafter creates.
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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.
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The first of which is that you don t even have to go up on the roof.
The first thing you need to do is download and install google earth pro.
Outside of the u s a degree angle is typically used.
And even flat roofs usually have a little bit of a slope so you might want to use a roof pitch multiplier once you have your area figured out 1.
Zoom in on the roof then select tools at the top left then select ruler.
For help determining the area of a sloped roof see here.
There are many great benefits to using google earth to measure your roof but nothing is as good as using diy s satellite roof measurement.
See the image below for more explanation on rise run and pitch.
A 12 in 12 pitch is a steep 45 degree angle roof.
If the angle changes too much when you zoom in go to view at the top left then click on reset at the bottom of the drop down menu then click tilt.
This can make it even safer to do your measuring and it also removes a level of guessing to your calculation.
To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil.
First measure 12 inches from one end of the level and make a mark.
Often you express roof pitch as the ratio between the rise and the run in the form of x 12.
Google earth pro was the paid version of google earth it used to.
Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.
You ll need to figure out the vertical distance also known as the rise over a 12 horizontal segment also known as the run.
A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.
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.
Record these values as roof rise over run with the vertical measurement listed first and the horizontal second.
It s pretty self explanatory after that.
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