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.
Square foot of roofing shingles.
3 50 5 50 per square ft however most roofing contractors will price your roof per square meaning 100 square ft.
This is simply 100 square feet of roof.
Packaging shingles are packaged in bundles that include a number of strips of roofing.
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.
A square simply refers to a 10 x 10 square of roofing.
The most common roofing materials used in the united states include shingles membrane roofing and ceramic tile all of which have different life spans.
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.
A square is the number of shingles it would take to cover 100 square feet of roof area with each row of shingles covering the tabs of the layer below it.
1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.
Of total coverage equals 1 square.
There s a couple different styles of roofing shingles.
Shingle roofs typically have a life span of 15 30 years while membrane roofs usually last 5 15 years.
To find the squares divide the overall roof area by 100 and then round up.
The average size roof is about 1500 square ft.