When buying a home, there are many important features that both sellers and buyers want to be made aware of. Two of the most important features to take a notice of, to either save money when buying a home or make more money when selling home, are the doors and windows. As a home buyer, new and modern windows can increase the insulation of the home and provide a low cost heat bill every month. As a seller, new exterior doors will add curb appeal to the home and new windows can increase the home value by nearly $10,000. Working with door and window installers of local window and door companies before buying or selling a home will help you save money or make money depending on your situation.