Then determine the area of the roof as if it were flat.
How to measure a roof for shingles from the ground.
The base is the bottom edge of the roof while the height is what you measure from the base to the top of the triangle in a straight perpendicular line from the bottom edge of the roof.
Hips and top ridge.
The length l times the height h of a triangle is twice its area a2.
Of course this will be assuming that your home is rectangular.
Measuring hip roofs dormer roofs or roofs on hillside homes from the ground requires experience and special equipment.
Estimating the area from ground level is less precise than measuring each side individually but it can make a quick easy and safe alternative when redoing a square or rectangular roof.
You may want to measure a couple to be sure.
Visually count how many ridge pieces are on your roof.
Multiply the pieces by inches based on exposure then divide by feet.
And then i will count the of rows of shingles between the gutter and the peak of the roof and then divide the number by 2 which gives me the height measurement.
So if the base is 5 feet 1 5 m and the height is 4 feet 1 2 m then you re equation would look like this.
Exposure comp shingles 5 5 shake 10 tile 13 5 14.
Start by measuring the length and width of the roof in feet as you re standing on the ground.
Section off your roof and write your calculations down as shown below dotted lines.
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.
1 roof square 100 square feet.
I typically begin by counting the of shingles from left to right which gives me the total width of the section in feet.
When using this method you will need to measure the rake of the roof while standing on a ladder.
5 feet 1 5 m x 4 feet 1 2 m 2 10 square.
After this you will need to measure the length of the building from the ground.
To measure an irregularly shaped roof you ll need to get on top.