As a homeowner, it’s time to discover all the advantages of a full service window and door showroom. AVI Windows & Doors, a Marvin Design Gallery has full-size room displays where you can explore and experience the quality of Marvin Windows and Doors, as well as home design products including millwork, specialty hardware, and more. Discover our full line of Integrity Windows made with Ultrex fiberglass and Infinity replacement windows as well. Our team of window experts guides you from design through installation with exceptional customer care.