A flush door is a type of door that has a flat, smooth surface without any panels or embellishments. It is typically made from materials like wood, metal, or fiberglass and is designed to provide a clean and modern look. Flush doors are commonly used in both residential and commercial buildings due to their simplicity and versatility. These doors can be solid or hollow, with solid flush doors offering better sound insulation and security. They are often used in interior spaces, such as bedrooms and offices, as well as exterior applications when paired with proper weatherproofing. Flush doors are easy to paint or finish, making them a popular choice for many design styles.