As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.
Square of roofing shingles cover.
The most usual case when buying standard shingles i e three tab strip shingles and laminated shingles there are 29 standard sized shingles 12 in.
The average bundle of shingles covers 33 3 ft 2 so three bundles of shingles are needed per square.
A square of shingles 3 bundles will cover 100 square feet.
Laminated and heavier three tab shingles therefore require four to five bundles to cover a square.
The most common is to have three bundles of shingles for a square of roof area.
A square of shingles is the number of shingles needed to cover 100 sq feet of roof area.
One roofing square is equal to 100 square feet.
Packaging shingles are packaged in bundles that include a number of strips of roofing.
Instead a square is a term of measurement all its own.
However shingles are packaged in a way that they are light enough for the average person to carry around.
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.
To find the amount of shingles you will need multiply the number of squares by three.
But be careful not all shingle brands are packaged three bundles to a square.
Imagine how cumbersome it would be to calculate by the square.
In other words if you buy 3 bundles of shingles this will cover one square which is 100 sq ft of area.
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.
Shingles are packaged in lightweight bundles intended for easy transport up and down a ladder and across precarious heights.
A bundle of shingles will cover roughly 33 square feet.
So most popular shingles are sold such that three bundles are needed to cover one square of roof area.
Each square will need three bundles of shingles to cover it.
Owens corning supreme 33 33 sq ft shasta white 3 tab roof shingles.
Item 12061 model sa12.
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.
So in a sense we re talking about square feet but using this unit makes it easier to calculate the footage or required materials and cost of a roofing project.