located in Chicago that specializes in the manufacturing and wholesale of vinyl windows and doors. Our company was established become one of the biggest and most modern window and door makers in the Midwest. We have

Lang Exterior is a manufacturer of vinyl replacement windows and patio doors, aluminum windows, and aluminum storm windows. They sell their products to contractors and offer direct vinyl window broken glass repair services to the public. You

replacement windows and patio doors since 1953. We have our own factory in Chicago, IL, where we manufacture more than 30 types of windows and patio doors as well as other vinyl products. We