O'Hara's Son Roofing (OSR)

OSR is a national commercial and industrial roofing provider headquartered in Chicago, IL. Established in 1987, OSR ranks among the Top 20 Roofing Contractors in the country (Top 10 among exclusively commercial roofing companies) and is registered and licensed in 48 states. Our national services include new commercial roof construction, roof replacement, leak repair/service, and preventive maintenance for commercial and industrial flat roofs. Our mission is to provide the highest quality service, materials, and workmanship to maintain our reputation as one of the nation’s best commercial roofing companies.