A folding sliding door, also known as a bi-fold door, is a type of door system that consists of multiple panels hinged together. These panels fold and slide along a track to open and close the door. Folding sliding doors are commonly used to connect indoor and outdoor spaces, such as between a living room and a patio or garden. They are favored for their ability to create wide openings, allowing for unobstructed views and easy access between areas. Additionally, folding sliding doors are available in various materials, including wood, aluminum, and uPVC, and they come in different configurations to suit different architectural styles and space requirements. They are often chosen for their aesthetic appeal, functionality, and ability to enhance the flow of natural light and ventilation within a space.