Renewal by Andersen is the division of Andersen windows developed strictly for the replacement window market. Renewal utilizes state-of-the-art materials that provide outstanding thermal performance, while maintaining the architectural integrity of the home. Replacement Andersen windows and doors that look like original equipment not replacement units. Windows, Doors, Bays & Bows, Patio Doors and Entrance Systems are all installed by our factory trained technicians. The replacement process is fast and easy. Depending on the time of year, your new windows could be installed in as little as 3 to 4 weeks.