Fire-resistance doors are designed to remain sealed shut and are made of a combination of glass, gypsum, steel, aluminum. In the event of an emergency, commercial fire doors within a business are essential to the safety of both employees and customers. Most are not easily seen and go unnoticed until that critical moment when they are activated. As many sit unused for months at a time, it's difficult to determine if there's a problem. Having fire doors inspected, tested and adjusted gives comfort and trust as a business owner that they will operate properly if an emergency situation arises.