Definis and Sons Window and Door Inc.

DeFinis and Sons is a family business established in 1959. We are meticulous craftsmen offering expert installation of vinyl replacement windows, basement windows, steel entry doors, security storm doors, aluminum storm doors, and sliding patio doors.

With over 50 years of experience in custom windows and doors, DeFinis and Sons have become the largest window and door installation company serving the Delaware Valley. In need of new windows or doors? Look no further! No one comes close to our knowledge, expertise, and professional installation.