Folding doors essentially create a window wall that folds in an accordion style towards one direction. When fully folded, they create a continuous space between the house and the backyard for indoor-outdoor living. Due to the single track, they are wonderful for remodeling your living space. When closed, they let lots of natural light into the house and allow for easy access to the backyard through the leading door panel, which can operate as a single swing door when the rest of the panels are locked. For inspiration, check out our project in La Jolla that uses LaCantina bifolds to create an indoor-outdoor entertaining area.