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Roofing Square Explained

 

What is a Roofing Square?

The term "roofing square" and "roof pitch" are the most commonly used terms in the roofing industry. 1 roofing square = 100 square feet. It does not matter how you arrive at 100 square feet
10 feet x 10 feet = 100 square feet or 1 roofing square
5 feet x 20 feet = 100 square feet or 1 roofing square
2 feet x 50 feet = 100 square feet or 1 roofing square
50 feet x 50 feet = 2500 square feet, so 2500 / 100 = 25 roofing squares

Bundles of roofing material per square

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.

Felts (Sqs per roll)

Some of more popular felts #15 lb felt; 4 squares per roll (Some 3 squares per roll)
#30 lb felt; 2 squares per roll
#30 lb 18" shake felt 1 square per roll
Fiberglass base sheet 1 square to 3 squares per roll
Cap Sheet 1 square per roll
Modified bitumen 1 square per roll

Other roofing materials pieces per square

Roofing tiles have a vast difference in how many pieces per square
The more popular concrete tiles around 90 pieces per square
Clay 1-piece (or S Tile) about 80 to 100
Clay 2-piece 160 and up

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This page last updated 07-19-2014