Allowing easy access to a deck or patio, a sliding patio door is an excellent alternative to hinged doors. Sliding open versus swinging these doors are ideal for tighter rooms. These doors glide open and usually have a handle versus a doorknob. This allows to door to be opened even if your hands are full and are designed to draw in natural sunlight while saving space. Perfect for patio doors or balconies. Sliding patio doors have large panels made of moving glass.