Therefore a 40 square roof would require approximately 120 bundles of shingles.
How many bundles in one square of roof shingles.
Each square will need three bundles of shingles to cover it.
If you are using three bundles to a square calculating bundle numbers is simple.
A roof square is equal to 100 square feet so each bundle covers roughly 33 1 3 square feet.
Each of your bundles can cover 33 3 sq.
This would be 87.
So most popular shingles are sold such that three bundles are needed to cover one square of roof area.
One bundle of shingles covers approximately 33 square feet of roof depending on the size and weight of the shingles.
To find the amount of shingles you will need multiply the number of squares by three.
Typically it takes three bundles of standard sized standard weight shingles to cover 100 square feet of roof surface.
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.
Four bundles to a square.
Find the total square footage of your roof by multiplying the width by the length and then divide that number by 100 and you will get the number of squares you need to cover.
Asphalt shingles are typically packaged with this in mind but if a package of shingles covered an entire 100 square foot square it would be too heavy to handle.
Of your roof area which is close to the sheet coverage area of 32 sq.
But be careful not all shingle brands are packaged three bundles to a square.