The square footage of your house is not the same as the square footage of your roof if there is any pitch. If you are asking aboutasphalt shingles, generally each bundle covers 33.3 square feet. Therefore find the square footage of your roof, divide it by 33.3 to find the number of bundles, then multiply the original square footage by 5-10% to get the number of additional bundles for cutoffs and starter strip. The variation in percentage accounts for the number and length of valleys of the roof. Example:[@5%]
roof =1500 ft2 --> (1500/33.3=45.05) (1500x.05=75 -->75/33.3=2.25)
45.05 + 2.25= (48) bundles
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A bundle of Shingles will cover roughly 33 square feet. A square of Shingles (3 Bundles) will cover 100 square feet.
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.
There are 9 square feet in a square yard(3x3). 150 times 9=1350 square feet
1350/depth of the concrete in feet
There are 9 square feet in one square yard. Therefore, 150 square yards is equal to 150 x 9 = 1350 square feet.