There are only 5 major brands of roofing shingles that are used for the majority of the roof replacement jobs in Ontario. We will explain here in detail about every one of the manufacturers, their origin, the quality of their products, market share, etc.

Here is the list

  • Owens Corning 
  • GAF
  • Certainteed
  • IKO
  • BP
Owens Corning Fiberglass Corporation began in 1938 after a merger between two leading glasswork companies of America at the time,Corning Glass Works and Owens-Illinois. The company, which became known simply as Owens Corning, entered the roofing and asphalt business in the 1960s and has continued to innovate over the years. Owens Corning employs over 19000 people in over 30 countries worldwide and has been a Fortune 500 company for the past 69 years. 


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