To find the amount of shingles you will need multiply the number of squares by three.
How many square feet does a bundle of roofing shingles.
A square is a 10 foot by 10 foot area and requires three bundles of shingles for coverage.
Normal architectural shingles are approximately 3 bundles per square.
Each plywood sheet is 4 x 8 feet or 32 square feet which coincidentally is almost exactly equivalent to the coverage of one bundle of traditional three tab shingles.
The average bundle of shingles covers 33 3 ft 2 so three bundles of shingles are needed per square.
Since transportation is a major cost factor expect prices to vary by location.
A square is 100sq feet if your using some of the heavier roofing most one bundle of shingle covers about 33 square feet of roof hence around 850 bundles of shingles will be needed for 28000 square feetroof.
There are approximately 33 33 square feet in a bundle of standard composite shingles.
If it s a re roof project and you have access to the original paperwork from the last shingle installation that may be useful in showing the roof area.
One bundle of shingles covers approximately 33 square feet of roof depending on the size and weight of the shingles.
Typically it takes three bundles of standard sized standard weight shingles to cover 100 square feet of roof surface.
This would be 87.
Four bundles to a square.
The square footage of a roof is normally measured in squares of 100 feet.