ViWinTech Windows & Doors A Manufacturer of Vinyl Windows & Vinyl Patio Doors, located in Paducah, KY. Serving 24+ states Manufactured CertainTeed Brand windows & doors from 1986 to1999 exited CertainTeed program and moved on to manufacturing ViWinTech proprietary branded products from 1999 to present. Manufacture an extensive line of Replacement Windows, New Construction Windows as well as Patio Doors. Also manufacture ShoreLine (R) Wind-Zone Rated coastal products and Florida Approved.