Firstly, these moving glass wall systems, manufactured & designed by Roll-A-Cover, open indoor patios to the outdoors in moments by simply sliding. Therefore, moving glass walls give the indoor space an outdoor ambiance even when the wall is closed. Above all, unlike a bi-fold door, the bays of this retractable wall retract into one another so there is no loss of space inside. In conclusion, Roll-A-Cover’s retractable wall systems are the perfect addition to any indoor space!