A: It is very important to replace your windows if they are in need of repair or damaged in any way. For example, if the wood frames are rotting this often leads to excessive amounts of condensation that will cause furniture and draperies to fade. You will definitely want to replace the windows immediately. If your windows are energy inefficient or you feel drafts when sitting near them, it is time for window replacement. And lastly, if you are simply tired of painting and staining old and faded windows, it is time to replace them with new, durable and low maintenance windows.