Step 2 of 8
Every manufacturer certification named on the quote
How to check it
A certification claim ('GAF Master Elite', 'Owens Corning Platinum Preferred', 'Malarkey Certified Premium', 'CertainTeed Master Craftsman SELECT') is checkable in minutes on the manufacturer's own domain, because each maker publishes its own directory. GAF's directory includes an explicit verification tool — its page says to enter the contractor's name or business to verify GAF certification. Owens Corning's locator lists network contractors by location and names Platinum Preferred as the top tier of its network. Malarkey's finder searches by postal code and distance and names its Certified, Certified Pro, and Certified Premium tiers. CertainTeed's Find a Pro connects homeowners with its credentialed contractors.
Where to check: https://www.gaf.com/en-us/roofing-contractors
Also fetched and confirmed: https://www.owenscorning.com/en-us/roofing/contractors · https://www.malarkeyroofing.com/find-a-contractor · https://www.certainteed.com/find-a-pro/
What a pass proves
That the certification exists and this company currently holds it, per the manufacturer's own directory — and, as described in each manufacturer's public materials, which extended-warranty tiers the company is eligible to offer (for example, GAF states that Master Elite contractors can offer its strongest warranties).
What it does NOT prove
A certification is a standing with a manufacturer, not an inspection of the roof being quoted. It does not prove the crew on the job trained under it, and a lapsed or misspelled certification on a quote is a fact about the quote's care, not necessarily about the roof.