Use a simple formula to approximate the square footage of triangular areas where two sections of a roof meet at each.
How to measure roofs from ground.
The first technique is referred to as the shingle count method which is used for estimating the measurements of all rectangular shaped sections of a roof.
Stretch your tape measure along the walls from end to end.
The length l times the height h of a triangle is twice its area a2.
To find the pitch of your roof you ll first.
The pitch is the steepness of the roof.
To sum it up each individual tab on a 3 tab shingle measures approximately 12 wide by 6 high.
Determine your roof pitch see roofpitch if you need help.
Use a pitch.
So if you divide your answer of a product of length times height by two you will get the area of a triangle.
Measuring your roof from the ground 1.
Measure the horizontal run of the roof surface from the ground a in the third figure below.
Then count the number of shingles to the peak of the roof.
Go all the way around your house and fill in your outline with your measurements making sure to account for overhang.
1 roof square 100 square feet.
Multiple the number of shingles times the width of each shingle which you can measure at ground level to get b in the figure below.
Research other methods for measuring a roof from the ground online or talk to a roofing contractor.
Find the length and width of the building s exterior walls.
Make a outline of your roof on paper.
Calculate the pitch of the roof.