What are the important differences between a 3-Season Patio Room and a Year-Round Sunroom?
There are many specific differences. Generally speaking, a year-round room is a full insulated room where a 3-season room is not. The year-round room offers double pane, low E argon-filled glass, an insulated roof, insulated foundation and a thicker more well-insulated wall system. It is designed to be heated (or cooled) and can be used on a year-round basis.