Bifold doors, also known as folding doors or accordion doors, are a type of interior or exterior door that consists of two or more panels that are hinged together. These panels fold in on themselves when the door is opened, creating a space-saving and stylish entry or partition. Bifold doors are commonly used in closets, pantries, room dividers, and as exterior patio or balcony doors. They offer the advantage of maximizing space utilization while providing an aesthetically pleasing and functional design element. Bifold doors are available in various materials, including wood, glass, aluminum, and composite materials, allowing for customization to suit different architectural styles and preferences.