1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.
How many square of shingles for 24x48 roof.
However if you are using heavier shingles you will require 4 to 5 bundles for a square.
It is common to use 3 bundles to a square of shingles.
The most common roofing materials used in the united states include shingles membrane roofing and ceramic tile all of which have different life spans.
So in the gable roof example above you would need 240 squares of underlayment.
For example a very steep roof on a 1 000 square foot attic will need more shingles than a lower sloped roof on the same sized attic.
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.
When figuring the amount of shingles needed to roof a house you first convert the total square footage of the roof to squares a square represents 100 square feet of area covered by shingles.
However shingles are packaged in a way that they are light enough for the average person to carry around.
To properly calculate how many bundles of shingles are needed to roof.
A square of shingles is the number of shingles needed to cover 100 sq feet of roof area.
How many bundles of shingles will you need the average bundle of shingles covers 33 3 ft 2 so three bundles of shingles are needed per square.
The most common is to have three bundles of shingles for a square of roof area.
When you are using 3 bundles for a square you will be getting 29 standard shingles in each bundle.
Shingle roofs typically have a life span of 15 30 years while membrane roofs usually last 5 15 years.
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 type of shingle called a three tab or strip shingle is generally packaged three bundles per square.
Singles are often sold in bundles with three bundles equaling one roof square.
Each square will need three bundles of shingles to cover it.
Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material.
For a new roof you will also need the same amount of underlayment.
Your roofer will know that steeper roofs use more shingles than lower sloped roofs for the same house size and there are established slope multiplier factors to make this calculation simple see table below.
In other words if you buy 3 bundles of shingles this will cover one square which is 100 sq ft of area.
Although roofing projects are estimated and sold by the square roofing material is often not sold in 1 square increments.
