Milgard and Andersen, two of the leading window manufacturers in North America, have some beautiful bay windows that you can take a look at. Milgard’s Tuscany Series, Ultra Series and Aluminum Series have gorgeous bay windows that offer different benefits, and Andersen’s 100 Series and E-Series offer environmentally-friendly, affordable and customizable windows. Lake Washington Windows and Doors is a certified installer of bay windows for both companies.