Is a contractor’s license enough to guarantee a good roof? No. While a California State License Board (CSLB) license proves a contractor has passed a basic test and carries insurance, it does not measure the quality of their work or their customer service. For homeowners in San Mateo, Palo Alto, and Santa Clara, the real gold standard is Diamond Certified. At Bay 101 Roofing, we worked hard to earn our Diamond Certified status because we know that in the Bay...