Iron doors are made from high-grade materials and they are very thick. They tend to stand up to the elements very well and most iron doors will last much longer than a standard wooden or glass door. An iron door can make a huge difference. You can add windows to other door materials, but they won't be as beautiful as wrought iron, and they won't come with the added security. An iron door can keep light flowing into your entryway, while still barring intruders from getting in.