Welcome to WIT Windows and Doors Imagine your home with new replacement windows and doors. Replacement windows are one of the easiest ways to increase the value of your home and increase energy efficiencies. Upgrade to the the latest innovations in energy efficient technology including double pane, triple pane, low e and argon gas with leading brands such as Simonton, Ply Gem and Milgard. Replace that old sliding door with one that rolls with ease. Patio doors are also available in the French Door style and in various configurations.