70 x 34 = 2380.. every 100 square feet makes 1 square,, so 2380 = 24 squares plus your cuts and ridges & starters,, usually you would figure an extra 2 squares.
It depends on the size of the shingle!
Some concrete shingles did contain asbestos. Many shingles never were made with asbestos.
To determine how many shingle squares are needed to cover 344 square feet, first note that one square of shingles typically covers 100 square feet. To find the number of squares required, divide 344 by 100, which equals 3.44. Since you can't purchase a fraction of a square, you would need to round up to 4 squares to cover the entire area.
26 shingles in a bundle of three tab asphalt shingles
A square of shingles covers 100 square feet. So, you need 1732/100=17.32 square of shingles. If you can only buy whole number squares of shingles, you will need 18 squares of shingles to cover 1732 square feet.
1.2 squares.
Shingles vary in dimensions, and sometimes there are specific bundles of shingles made for the sole purpose of ridge coverage. If you are using the house shingles for ridge, take the length of ridge to be covered, divided by the exposure of the shingle to determine the number of ridge pieces needed. Normally you will get three pieces out of one full shingle. Once you determine the number of full shingles, find out how many shingles are in a bundle and purchase the smallest bundle of shingles necessary to complete the job.
Standard fiberglass shingles come 3 bundles to the square.
20 squares or 60 bundles
American shingles are 36" Metric Shingles are 1 meter long or 39-3/8" Many American manufacturers are selling metric shingles, not american. So check what you are buying.
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.
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