O Hagin s started as a roofing company more than 30 years ago. Founded by Carolina and Harry O Hagin, the company grew from a small shop into an international construction materials manufacturer. Committed to testing, O Hagin s was one of the first companies to seek and secure testing approvals for attic ventilation products. The company has local and national testing approvals and is recognized for its industry-leading efforts in research and development. The firm has more than 10 domestic patents and multiple international patents, with dozens more patent applications pending. The company s services include preconstruction services, custom product designs, onsite installation instruction, pre- and post-installation support and architectural drawings. Its products include flat clay, M clay, S clay, flat concrete, M concrete, S concrete and slate and shake in a variety of colors, including charcoal, brown, black, white, gray, galvanized steel, aluminum and copper. O Hagin is headquartered in California.