Steel doors are built using high-strength steel, making them exceptionally durable and reliable. Although they are not fully solid steel, these doors feature a polyurethane or polystyrene core covered with a robust steel skin, providing both strength and insulation. Because of their durability and low maintenance needs, steel doors are widely used in industrial, commercial, and high-security environments. Steel’s natural toughness gives it a clear advantage over other materials—offering superior security, fire resistance, soundproofing, vandal resistance, and hygiene benefits. In demanding conditions, hollow metal steel doors consistently outperform wood, aluminum, and fiberglass, making them one of the best choices for long-lasting performance and safety.