Petaluma, Calif. – September 19, 2026 -- American Ratings Corporation is expanding its Diamond Certified Resource rating system into Colorado, targeting roofing contractors in Denver, Arapahoe, Boulder and Jefferson Counties as the initial trade category for the new market.
Colorado roofers face a September 23 application deadline for early market entry
Roofing companies in the four Colorado counties can apply for Diamond Certified status until September 23, with a limited number of "Founder" positions available per county on a first-applied basis. Founders receive five years of free top placement, a locked-in rate, and a money-back guarantee tied to the certification.
CEO cites hail and storm damage as driver of Colorado expansion
CEO Greg Louie said the company selected roofing contractors for the Colorado launch because homeowners in the region regularly contend with hail and storm damage. Director of Ratings David Pak said certified companies stand to gain visibility in AI and Google search results, win more head-to-head local competitor comparisons, and secure pricing power over rivals that compete primarily on price.
Certification requires a 12-step process beyond standard online reviews
Companies must pass a 12-step rating process that includes surveying a large, random sample of real customers on quality of work, helpful expertise, and repeat-use intent. Firms must also clear credential checks covering business licensing and insurance, and are evaluated on customer-friendly business practices, contract performance, and their track record of standing behind completed work.
Diamond Certified has operated in the San Francisco Bay Area for 25 years
For the past 25 years, Diamond Certified Resource has connected consumers with top-rated companies across service industries including auto repair, dentistry, roofing and construction, primarily across Bay Area counties such as Alameda, Contra Costa, Santa Clara and San Francisco. The Colorado rollout marks the certification model's expansion beyond its California base into a new geographic market.