Our Roofing Certifications

Cornerstone Roofing holds elite credentials with the top major roofing manufacturers in the U.S.  Adhering to the manufacturers’ installation guidelines, Cornerstone utilizes the highest quality roofing products, upholds a strong standard of excellence in the roofing industry, and displays extensive knowledge in each product we offer.

Recognition & AwardsIndustry Associations




Cornerstone Roofing has been a SELECT ShingleMaster Roofing Contractor (highest credential level) since 2006, and became an official Tenured Member in 2016. This status with CertainTeed gives us the ability to offer the strongest warranty available to our customers: the CertainTeed 5-Star SureStart PLUS Extended Warranty.


Through testing and regular re-accreditation, Cornerstone’s roofing installation crews, Foremen, Job Supervisors, and Estimators are Master Shingle Applicator (MSA) certified through CertainTeed. Completing the MSA Test also makes the roofing installers qualified to install a CertainTeed 5-Star SureStart PLUS warranted roof.


Cornerstone employees are Shingle Quality Specialist certified as a part of the CertainTeed SELECT ShingleMaster credential level. Earning the Shingle Quality Specialist designation means the employees have passed the CertainTeed Shingle Technology test which covers roofing shingle products and quality standards.


As a CertainTeed Credentialed Roofing Contractor, Cornerstone Roofing is a CertainTeed Roofing Responsibly™ Shingle Recycling Program Roofing Contractor, which means we ensure your composition shingles are responsibly recycled upon tear off and turned into paving materials.

Owens Corning

Cornerstone Roofing is an Owens Corning Roofing Preferred Contractor. Preferred Contractors are part of an exclusive network of roofing professionals who meet high standards and strict requirements for professionalism and reliability. Homeowners Associations often require Owens Corning’s Woodmoor and Woodcrest roofing materials.

Owens Corning

Cornerstone Roofing has taken the Owens Corning Roofing Contractor Network Shingle Recycling Pledge. Our commitment to recycling torn-off shingles means the shingles are repurposed as pavement and do not end up in a landfill. We care about helping the environment and roofing responsibly. We are proud to be contributing to a sustainable solution in the roofing industry.


In addition to CertainTeed, GAF, and Owens Corning, Cornerstone Roofing also offers PABCO Roofing products. Several Homeowners Associations have PABCO’s Paramount Advantage and Pabco Paramount roofing materials on their list of allowed materials. We offer free roof estimates and our knowledgeable estimators are happy to help you with finding the right roofing material for your home.


In addition to CertainTeed, Owens Corning, and PABCO roofing materials, Cornerstone Roofing also offers GAF roofing materials and often work with homeowners on their HOA required GAF Grand Canyon and GAF Grand Sequoia roofing products. Our estimators can take a look at your roof and offer a comparison between GAF, Owens Corning, PABCO, and CertainTeed’s Presidential and Presidential TL shingles.

What does it mean to be a CertainTeed SELECT ShingleMaster?

“A CertainTeed SELECT ShingleMaster™ is in the top 1% of their profession. In other words, the best-of-the-best. Proud to have you in our corner Cornerstone Roofing!”

- CertainTeed Roofing

To achieve this credential level, Cornerstone has exceeded each of CertainTeed’s requirements:

  • Owner abides by the “Code of Ethics and Professional Practices” terms and conditions and has qualified as a fiscally responsible business owner.
  • Shingle Quality Specialist certified
  • All Job Supervisors and at least 50% of the shingle installation workforce are Master Shingle Applicator certified
  • Current workers’ compensation insurance as required by law and liability insurance covering roofing are current and on file with CertainTeed.

Cornerstone has been in business since 1996 and a SELECT ShingleMaster for over a decade, since 2006.

Why Cornerstone?


Experienced & Reputable

Installing Composite/ Asphalt Shingle roofs since 1996. We have been recognized as one of the Puget Sound's top rated roofers.



Licensed, Bonded, Insured

Cornerstone has operated under the same license for nearly three decades. License # CORNERI011CM.



Fair Pricing Plus Financing Available

Cornerstone's experienced estimators are accurate and detailed. We offer No Payments and No Interest for 12 months (OAC).

Cornerstone Roofing, Inc.



Serving King and Snohomish Counties

SINCE 1996