The Aluminum Thermal Break Slide & Fold Doors by Fistech can be opened partially to allow easy access or even wall to wall to offer an unobstructed view. These doors are built to last, are energy-efficient and impart better ventilation alongside heat insulation properties to keep the temperature of the room cool. The thermal break slide & fold doors made by Fistech seamlessly blend with the interiors and exteriors of your space. These aluminum doors have an extra layer of Nylon: Polyamide that leads to superior heat insulation.