Start by measuring the length and width of the roof in feet as you re standing on the ground.
How to measure roof shingles from ground.
Make a outline of your roof on paper.
Multiply the angle measurement for the pitch of.
Determine your roof pitch see roofpitch if you need help.
To sum it up each individual tab on a 3 tab shingle measures approximately 12 wide by 6 high.
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.
Measure the horizontal run of the roof surface from the ground a in the third figure below.
Then determine the area of the roof as if it were flat.
Mark a length of 1 foot 0 30 m on a long level starting from one end.
You will then have to get the measurement of the rake of the roof.
Go all the way around your house and fill in your outline with your measurements making sure to account for overhang.
To do this you need to note that one tab will be equal to 1 foot.
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.
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.
If the existing shingles are standard 3 tab shingles you can get this measurement by taking note of the number of tabs along the eaves and ridges then determine the length in feet.
Hold the end you measured from against the bottom of a rafter so it s sticking straight out horizontally and is level.
Then count the number of shingles to the peak of the roof.
If you were to click on the peaks it wouldn t give you an accurate reading of your measurement.
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.
From the 1 ft 0 30 m spot you marked on the level measure upward to the rafter.
Thus in a simple style house you ll only have to click on the corners.