When it comes to choosing the right roofing materials for your project, you want to make sure you’re getting the best quality and reliability.

One way to gauge this is by looking at the largest roofing manufacturers in the industry. In this blog, we’ll explore who the biggest players are and what sets them apart.

GAF Materials Corporation

Size: GAF is one of the largest roofing manufacturers globally, with a significant presence in North America.

Notable Features:

  • They offer a wide range of roofing products, including asphalt shingles, TPO and PVC membranes, and more.
  • Known for their Timberline® series of shingles, which are popular for their durability and aesthetic appeal.
  • GAF provides comprehensive warranties on their products.


Size: CertainTeed is another major roofing manufacturer, operating primarily in North America.

Notable Features:

  • They offer a diverse range of roofing materials, including asphalt shingles, metal roofing, and more.
  • Known for their Landmark® series of shingles, which are well-regarded for their quality and appearance.
  • CertainTeed provides various warranties to suit different roofing needs.

Owens Corning

Size: Owens Corning is a global company, making it one of the largest roofing manufacturers worldwide.

Notable Features:

  • They produce a variety of roofing materials, including fiberglass shingles, underlayment, and insulation products.
  • Their Duration® series of shingles is a popular choice for homeowners and contractors.
  • Owens Corning offers strong warranties on their roofing products.

IKO Industries

Size: IKO is a global roofing manufacturer with a presence in North America, Europe, and Asia.

Notable Features:

  • They offer a wide range of roofing products, including asphalt shingles, synthetic underlayment, and more.
  • IKO’s Cambridge® shingles are known for their quality and impact resistance.
  • The company provides warranties on their roofing materials.

Which Manufacturer Is the Largest?

Determining the single largest roofing manufacturer can be challenging as it often depends on how you measure “largest” (by revenue, production volume, or market share). However, the manufacturers mentioned above consistently rank among the industry leaders.

When selecting a roofing manufacturer for your project, consider factors such as product quality, warranty offerings, and the specific roofing materials that match your needs. It’s also essential to work with experienced roofing contractors who are familiar with these manufacturers’ products to ensure proper installation and performance.

In conclusion, the roofing industry boasts several major players, each with its strengths and offerings. By researching and understanding these manufacturers, you can make an informed decision and choose the one that aligns best with your roofing project requirements.


As a civil engineer and roofer, I love to share the experience that I have gained through the last couple of years. In the roofing industry, practical experience is a very crucial fact that can help you a lot. Hence, I want to help you with my blog.

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