Elegant, contemporary Marvin Bi-Fold doors open wide to infuse a room with fresh air and spectacular views. Configured from two to eight panels, Bi-Fold doors use an extruded aluminum track to fold smoothly to one side, stylishly and effortlessly connecting your space to the outdoors or to another room. Marvin Bi-Fold Doors are ideal for making a dramatic connection with verandas, gardens and more — or expanding a room into adjoining interior areas.