The square footage of a roof is normally measured in squares of 100 feet.
How many bundles of roofing per square.
Bundles of roofing material per square.
This roof shingle calculator requires four basic inputs.
Each square will need three bundles of shingles to cover it.
As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.
On the low end asphalt averages 100 and 150 per square while slate averages about 1 200.
The most common type of shingle called a three tab or strip shingle is generally packaged three bundles per square.
Specialty shingles such as iko armourshake are heavier and therefore packaged to cover 20 square feet per bundle or five bundles per square.
The average bundle of shingles covers 33 3 ft 2 so three bundles of shingles are needed per square.
A bundle is around 1 3 of a square and costs an average of 30 to 600.
For a new roof you will also need the same amount of underlayment.
So in the gable roof example above you would need 240 squares of underlayment.
Four bundles to a square.
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.
But be careful not all shingle brands are packaged three bundles to a square.
A square is equal to 100 square feet and will cost anywhere between 100 and 1 800.
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.
Normal architectural shingles are approximately 3 bundles per square.
A typical bundle of shingles weighs about 75 pounds while some premium products can weigh over 100 pounds per bundle so consider delivery of materials.
Since transportation is a major cost factor expect prices to vary by location.
Felts sqs per roll.
It can also include some of the lighter weight laminated shingles.
There are also 29 standard sized shingles measuring 12 inches by 36 inches in each one of these.
Most composition shingles are 3 bundles per square most of the 40yr composition shingles are 4 bundles per square some 5 or more wood shakes 5 bundles per square wood shingles 4 bundles per square roofing felt per square roofing felt comes in a wide variety coverage s.
Read the label carefully as some brands need a bit more than three bundles to cover 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.
The most common you find apply to three tab shingles and take three bundles of shingles for each square.
How many shingles in a square.
With that as background you are now ready to estimate how many shingles you will purchase for your roof project.
Once you look at the more substantial three tabbed variety these require four per square and sometimes possibly five to cover the same square.
This would be 87.