Pitch measurement method 2 2.
Measure my roof.
The images that appear on google maps are often at a slight angle which combined with the angle of a roof can cause errors.
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If you were to click on the peaks it wouldn t give you an accurate reading of your measurement.
For this reason it is best to outline the roof at points which are all at the same elevation.
To find the pitch of your roof you ll first.
Calculate the pitch of the roof.
Remember that the length and width need to be found for the roof not the house so take into account that the roof overhangs the building.
For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
Start by measuring the length and width of the roof in feet as you re standing on the ground.
Then determine the area of the roof as if it were flat.
If this distance measures 4 inches you have a 4 in 12 pitch.
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How to use the google maps area calculator tool to measure a roof special precautions must be taken when measuring the area of a roof.
The pitch is the steepness of the roof.
Find the length and width of the building s exterior walls.
Outline the roof at the points that are on the same level or elevation to ensure that you re getting an accurate calculation of your roofing measurements.
We ll use satellite imagery and trigonometry to calculate your roof s measurements.
8 inches and you have an 8 in 12 pitch.
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.
Make sure to document the number of chimneys skylights or other obstructions and include dormers in your measurements.
The length l times the height h of a triangle is twice its area a2.
Measuring your roof from the ground 1.
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.
So if you divide your answer of a product of length times height by two you will get the area of a triangle.
Stretch your tape measure along the walls from end to end.
How to calculate your roof square footage first measure the length and width of each surface on the roof then multiply these values to get the square footage of that surface.
L 30 feet h 12 feet 30 12 2 180 square feet.
Use a pitch.