Multiply the length by the width of one side of a gabled roof and then multiply by the slope (pythagorean theorm; e.g. 9 squared + 12 squared = 15 squared) and double it (two sides to a roof). This suare footage will give you the amount to divide by a bundle of shingles which covers 32 sq. ft.
26 shingles in a bundle of three tab asphalt shingles
Depends on the type of shingle (asphalt, shake, slate, etc.). Most asphalt shingles weigh about 75lbs/bundle, at 3 bundles per square (100 square feet per square).
3 bundles of shingles = 100 square feet 1 bundle of shingles = 33 1/3 square feet
Shingles are rated in pounds / 100 square feet. Typical ratings are 235# or 265#. 1 bundle of shingles covers 1/3 of 100 sq feet. 235# shingle / 3 = 78.33 lbs
There are 100 square feet. A "square" of any building material will cover a 10'x10' area. Don't mistake a bundle of shingles for a square, there are 3-1/3 bundles in a square. The coverage will actually vary. 3 1/3 bundles may be standard for a 3 tab asphalt shingle but other styles and materials will vary.
A bundle of Shingles will cover roughly 33 square feet. A square of Shingles (3 Bundles) will cover 100 square feet.
Roughly 33 square feet. Three bundles make a square ( 100 sq. ft. )
3 square feet
A square of asphalt shingles, installed according to mfg instructions, covers 100 sq. ft.
There are 3 bundles of shingles in every square. A square is 100 square feet. In 23 bundles, you would have 766 square feet approximately
The professionals get up on the roof and use a tape measure. One square = 100 square feet.
9 bundles assuming std. 3 bundle/sq. shingles