FISO Door manufactures high-quality doors specifically designed for the Metal Building Industry. Our knockdown door kits come complete with all necessary components — including the door, frame, sub-frame, and hardware — and are packaged for quick and easy field assembly. Available in 20- and 18-gauge door options with durable 16-gauge galvannealed steel frames. FISO Door offers a superior powder coating finish in white, bronze, or custom RAL colors, providing both durability and a refined appearance straight out of the box.