To estimate roofing materials start by finding the total square footage of the roof and divide the number by 100 to determine the number of squares in the roof.
How many bundles in square of roofing shingles.
One bundle of shingles covers approximately 33 square feet of roof depending on the size and weight of the shingles.
However shingles are packaged in a way that they are light enough for the average person to carry around.
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.
A square of shingles is the number of shingles needed to cover 100 sq feet of roof area.
So most popular shingles are sold such that three bundles are needed to cover one square of roof area.
Of roof area close enough to the 32 sq.
Once you have a three bundle pack to cover a square you will have 29 x 12 inches by 36 inch standard sized shingles per bundle.
There are also 29 standard sized shingles measuring 12 inches by 36 inches in each one of these.
Underlayment usually comes in rolls of 4 squares each.
For a new roof you will also need the same amount of underlayment.
As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.
If the shingles you are using come three bundles to a square calculating the number of bundles you ll need is simple.
Once you look at the more substantial three tabbed variety these require four per square and sometimes possibly five to cover the same square.
How many shingles in a square.
Typically it takes three bundles of standard sized standard weight shingles to cover 100 square feet of roof surface.
But be careful not all shingle brands are packaged three bundles to a square.
It typically takes three bundles of standard three tab asphalt shingles to cover one square on a roof.
Since it takes 3 bundles of shingles to cover a square plan to purchase 3 bundles for each square.
Each square will need three bundles of shingles to cover it.
Each bundle covers 33 3 sq.
The most common type of shingle called a three tab or strip shingle is generally packaged three bundles per square.
So in the gable roof example above you would need 240 squares of underlayment.
Laminated and heavier three tab shingles therefore require four to five bundles to cover a square.
Asphalt shingles range in price from about 25 per bundle for a standard 3 tab style to around 50 75 or more for an upgraded architectural style.
Then add 10 to the number to account for waste.
A roof square is equal to 100 square feet so each bundle covers roughly 33 1 3 square feet.
To find the amount of shingles you will need multiply the number of squares by three.