If you want the extra security and energy savings offered by a new insulated steel door β or if you just love the look of the decorative doors which are available β it may be time to take a deep breath and dive into a door replacement project. It's a job you may be able to do yourself, but you must overcome the psychological hurdle of temporarily creating a hole in your house that is open to the outdoors. Also, exterior doors are likely to be heavier, and a helping hand would make the project progress more smoothly.