Owens Corning, founded in 1938, is one of the oldest companies on our list, in addition to being one of the most successful, with an estimated value of more than $8 billion. They offer a variety of products, including 3-tab shingles, architectural, dimensional, designer, premium, and luxury shingles.
GAF is not only the oldest company on our list (founded in 1886), but they’re also the most financially successful, with an estimated value of $3 billion. In addition to offering 3-tab shingles, dimensional, architectural, premium, luxury, and designer shingles. GAF also manufactures various other roofing products, including roll roofing, slate roofing, ventilation products, solar roofing products, fiber cement siding, modified bitumen, and more.
CertainTeed provides contractors with a certification program, which impacts the warranty you receive on their products. These warranties vary based on the product but range from five to 10 years. CertainTeed, estimated at more than $2 billion, has one of the best reputations in the roofing industry. Don’t be surprised if your roofing contractor encourages you to use CertainTeed, as many industry professionals believe they’re the best manufacturer.
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