Having a sunroom is a great idea, but in the winter all of those windows can make that room downright cold. So to keep your sunroom useable in the winter, here are some window insulation ideas to keep the sunroom comfortable and not have to keep it closed for the winter.Sunroom Window TreatmentsWinter window treatments for your sunroom are generally heavier and darker than regular window treatments. They act as a decorative barrier that is hung between the window and the sunroom to block the cold air from coming in from your window. This barrier will help keep your sunroom warmer than if you had nothing at all up on the windows of your sunroom or if you had flimsy window treatments up.In the summer, you can also use them during the hottest parts of the day to keep the sunroom cool from the hot summer sun.Sunroom Draft BlockersDraft blockers can also help keep your sunroom insulated by blocking any cold drafts that are coming in from under your exterior sunroom door. If you have older windows in your sunroom, that open, draft blockers can also work on them to block any drafts that they are letting in.Sunroom Storm Windows A bit more of an expensive idea, is to install storm windows on your sunroom windows. With the number of windows that are usually present in a sunroom though, this may not be the most economical idea.Plastic InsulationPlastic insulation may not be the most attractive way to insulate your sunroom, but it is effective. Simply purchase one of the inexpensive insulation kits that are available at any hardware store and follow the directions.The plastic will block the cold from getting in your sunroom through any open space in your windows and also when the glass of the windows themselves gets cold.Insulation without the Annual WorkThe easiest way to insulate your sunroom is to just have new energy-efficient windows and doors installed. These windows and doors are created to block the cold from getting in your home, and keeping the heated air in your home without all of the insulation taping, additional storm doors, draft blockers, and heavy window treatments.For even better insulation in your sunroom, pair your energy-efficient windows with one of the other insulation ideas above.