Cleasby Roofing Products Cleasby Manufacturing Inc is a manufacturer and a distributor of equipment and tools. We have service centers for both the commercial and residential industry. We have been serving the Western United States since 1949. Cleasby has four locations, San Francisco, Ca (Headquarters, Mfg. & Dist), Riverside, Ca (distribution warehouse), Westminster, Co (Mfg. & Dist.),...