Accordion door, also known as a folding door, is a kind of door whose design allows it to be folded into a harmonica when opening. They are made of many connected panels which, when the door is opened, fold in parallel and close towards one side of the door opening. Such doors are a popular solution in places where traditional doors would occupy too much space or where flexibility is needed. Accordion doors are used both in residential and commercial buildings. They are often used to separate large rooms or multi-purpose spaces. They are available in a variety of styles and materials, which allows you to match them to different interiors and needs of users.