Roofing Square Examples

  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.
  Some of more popular
  #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