Security Builders Supply Company is the commercial division of Security Lumber and Supply. Security Lumber and Supply has been serving general contractors & builders and for over 62 years. The door and window commercial division is located in Oswego, Illinois. We have stock major manufacturers like Marvin, SiverLine, Therma Tru, Wausau, Simpson, Andersen. We specialize in steel doors, steel frames, pre-machined wood doors, pre-finished wood doors, and door hardware for commercial use. We have brand names like Steelcraft, Seco and Curries. Call us to supply your doors and hardware for government jobs, school jobs, and hospital jobs. We offer delivery to your work site. Call us now.