21
13 square. 1 square of shingles is 100sq feet.
That depends on the size of the shingles. ************************************************************** Size of shingles makes no difference. Shingles are sold by the bundle and the amount of bundles per square depends on the weight of the shingles. So you could have 3 bundles, 4 bundles or 5 bundles per square but they still add up to a (100 sq ft) square. The only difference would be if you are dealing with metric shingles, which is not going to make a big difference in the area covered. A square of shingles covers 100 sq ft. So for a 672 sq ft roof you will need 7 squares. Dave
i think it should take 7 bundles
each bundle does 33.3 sq ft.
It says on the side of the box of shingles how many square foot it willl cover so figure that out and multiple tilll.you hit two hundred say each box did ten square foot you would nned twenty boxes,
A square covers 100 sq. ft. so 7 squares plus 2 bundles for the starter course and the ridge cap.
a square in roofing stands for 100 sq ft. so in this case you have 192 sq ft or 1.92 squares. you must also allow for the starter row, cap, and waste. i good rule is to add 10% to your measurements. 192 x 1.10 = 211.2 sq ft or 2.1 squares. this would be 7 bundles of most shingles ( 3 bundles/square)
To determine how many squares of shingles are needed to cover a 648 square foot roof, you divide the total area by the size of a square of shingles. One square of shingles covers 100 square feet. Therefore, you would need 648 ÷ 100 = 6.48 squares of shingles. Since you can't purchase a fraction of a square, you would need to round up to 7 squares.
With composition shingles of lighter weight, three bundles will do a square (one hundred square feet). Heavier shingles often come packaged as four bundles per square. Some of the shingles come in as much as 7 bundles per square like the GAF-Elk Camelot they are more expensive but look good and have a lifetime warranty.
There are 3 times 7 = 21
7
7