Window World of Long Island, a locally-owned franchise of Window World, is located in Farmingdale, NY, just 16 minutes from Nassau County and surrounding areas. As a leading provider of vinyl replacement windows, doors, vinyl siding and gutters, our friendly sales representatives will gladly provide you with a free estimate and in-home demonstration. Window World of Long Island is confident in our lifetime guaranteed products and installation. During your no obligation, in-home demonstration, our sales representatives will show you samples of our replacement windows, doors or vinyl siding and provide you with a free estimate. They will also answer any questions you may have and discuss upgrade options, including Low-E glass, Argon gas, grids and different colors.