For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
Measure my roof.
If this distance measures 4 inches you have a 4 in 12 pitch.
The length l times the height h of a triangle is twice its area a2.
1 roof square 100 square feet.
The pitch is the steepness of the roof.
To find the pitch of your roof you ll first.
The images that appear on google maps are often at a slight angle which combined with the angle of a roof can cause errors.
Roof sketch for roofing contractors create professional looking roof measurement reports at no cost try it free.
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.
Stretch your tape measure along the walls from end to end.
Outside of the u s a degree angle is typically used.
Make sure to document the number of chimneys skylights or other obstructions and include dormers in your measurements.
If you were to click on the peaks it wouldn t give you an accurate reading of your measurement.
We ll use satellite imagery and trigonometry to calculate your roof s measurements.
Start by measuring the length and width of the roof in feet as you re standing on the ground.
Thus in a simple style house you ll only have to click on the corners.
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.
L 30 feet h 12 feet 30 12 2 180 square feet.
Calculate the pitch of the roof.
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.
Pitch measurement method 2 2.
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.
Then determine the area of the roof as if it were flat.
Measuring your roof from the ground 1.
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.
Use a pitch.
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.