Often times our customers ask if they need to replace their windows or not. Usually after doing research we find that if they are asking the question, then that probably means yes. I found this to be true because if they are asking, it usually means that it has been a long time since they have replaced their windows. This means they are more than likely not up to code and that they are to thin to keep in the heat. If you have windows that are 10 years old or older, then it would be a good time for you to begin to check into new windows.