What GAF Master Elite, Owens Corning Platinum, and other contractor certifications actually mean for your warranty.
Synthetic shake, slate, tile
CertainTeed is one of the oldest roofing manufacturers in North America, and its SELECT ShingleMaster program has strict volume and training requirements.
Composite shake and slate
GAF is the largest roofing manufacturer in North America, and its Master Elite contractor program certifies the top 2% of installers nationally.
Malarkey is a smaller, Pacific Northwest-founded manufacturer known for rubberized asphalt shingles built for cold, wet climates.
Owens Corning is one of the largest roofing manufacturers in the U.S., known for its Duration shingle line and Preferred Contractor network.