National Glass & Glazing (NGG, Ltd., Inc.), a full service curtain wall design, fabrication and installation contracting company was established in St. Louis, Missouri in 1982, Our focus in the industry is larger construction with custom curtain wall applications. NGG, Ltd., Inc. designs, manufactures and installs all of its own wall systems. Our scope of work includes unitized pre-glazed curtain wall, composite metal panels, stone and pre-cast panels, ceramic tile panels and customized sunshades and trims. Although this is our main focus, we also collaborate with key suppliers of proprietary curtain wall systems to suit the demand of any project. Our customer base spans from commercial building high rises, hospitals, academia, state, local and federal buildings that meet the latest blast/ ballistic, hurricane and tornado protection requirements. Over the history of NGG we have created strategic relationships with other similar companies and utilized their strengths as subcontractors to supplement capacity and compatibility needs of NGG, Ltd., Inc. in the execution of our projects. Some of the work we use these subcontractors for includes perimeter sealant, insulation, custom entrances, skylights, clerestory and numerous other compatible glazing solutions.. Through the years NGG, Ltd., Inc. has serviced general contractor clients in Texas, Illinois, Missouri, Washington, Mississippi, Oklahoma, Tennessee, Virginia, and Kansas in glass integration and exterior wall solutions.