Mon-Sat 8 am - 6 pm Cash, check, cc There can be no single solution when it comes to NYC windows and doors. When you want a Manhattan storefront or NYC curtain wall, you may look through hundreds of styles and thousands of colors. Find a professional you can rely on to help you envision the possibilities and install the perfect fit. Commercial & Industrial Curtain Window Walls. A curtain wall is the glass outer layer or facade on a commercial or industrial building. Curtain wall systems protect the exterior of a building from the elements. A grid in the facade, also known as the mullion, determines how the glass fits into the wall. Glass curtain walls help natural light enter buildings, which makes them more energy efficient. Glaze curtain walls use specially glazed glass, providing an esthetically pleasing exterior or interior for your office building. Curtain walls have been used in commercial buildings for a long time, especially in New York City. Placing a curtain wall on the exterior of New York City commercial or industrial building is now a common practice. Recently, though, curtain window walls also have been used in some industrial and residential construction. Being highly adaptable, curtain window wall and interior glaze curtain wall can be custom-made to fit almost any type of building. They match most modern home and commercial building designs.