Not every home needs a storm door. For example, if your door is exposed to direct sunlight for a number of hours per day, the heat generated with a storm door could damage your door. Also, if your door is protected by a porch or another kind of overhang, you don’t need a storm door. But, if you need extra security or weather protection you may need a storm door. You can also use a storm door if you want to add more light and airflow into your home.