Consolidated Glass Holdings, Inc., fabricates a wide variety of high-quality architectural glass and security glazing products. Our Architectural Division includes Columbia Commercial Building Products, J.E. Berkowitz, and Solar Seal, while our Security Division is comprised of Dlubak Specialty Glass Corporation, Global Security Glazing, and North American Specialty Glass (NASG Holdings, Inc.). As a single-source fabricator, we provide customers with an integrated package that may include exterior insulating glass units, decorative interior glass, bent glass, bullet-resistant glazing, delayed forced-entry CHILDGARD security glazing and INVISIWALL engineered glass systems for their buildings.