concerned about energy-efficiency, you may find that several parts of the home need to be replaced shortly after purchasing the home. While the roof may still be in decent shape, for example, you will likely need to replace it far sooner than you would if you were to purchase a new home. The same is true of major appliances, such as your heating and cooling system. More than likely, these items will not need to be replaced within the first few years. Still, since these items generally are not new when purchasing an older home, you will likely need to replace them within the next ten years or so.