Lang Exterior, is a vinyl window manufacturer located in Chicago, IL. We have been a window manufacturer since 1953. We currently manufacture over 30 kinds of windows and other vinyl products. Our sister firm, Top Coat. is the leader of profile laminating in the window industry. With Lang Exterior you know you're getting fast professional and professional service.
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My wife and I had a contractor rehab our house and they installed 13 Lang vinyl windows. They were really nice black exterior and white interior vinyl windows. We were having problems with a couple windows not operating properly, and I emailed Lang customer service. The next day I received a call the next day by David who was genuinely concerned with the problems we were having.
Made in USA
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Lang Exterior vinyl and aluminum windows and patio doors are entirely made in the United States. Lang opened for business in 1953 in Chicago, Illinois, and all of our factory production is still done in Chicago today. Lang Exterior not only extrudes its own custom-formulated premium vinyl profiles but also does vinyl lamination and fabrication of many other parts that go into its products.
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