Glass Enterprises Incorporated (GEI) opened on October 1, 1984 employing five full-time employees.  The business began as an insulated glass manufacturer and has since become a manufacturer of insulated glass, tempered glass, a glass fabricator as well as a flat glass and a Kawneer metal distributor.  Glass Enterprises, Inc. is the largest manufacturer of commercial insulated glass and distributor of flat glass in Eastern Pennsylvania.