Abstract: A sliding panel system can include a sealing mechanism such that, when a panel is slid to a closed configuration, one or more seal elements form a seal between the door panel and its surroundings at the top, bottom, and/or sides of the panel to reduce or prevent infiltration or communication of gases or liquids such as air or water. Manual or motor driven movement of the panel can move an actuation mechanism to extend the seals around the panel. The sealing member can include weather stripping, brush or another seal element for sealing contact with a header, floor, door, frame, or other surface. Multiple panels can be arranged to form a door panel system or a window panel system.

Abstract: A folding door system can include adjustable pivotal joints. Hinge-type pivotal joints can include one or more adjustable spacers to allow the relative positions of hinges and door panels to be easily varied. The pivotal joints, and included adjustable spacers, can be surface mounted to reinforcing cladding strips spanning substantially an entire height of a door panel. This surface mount facilitates access to the pivotal joints for rapid adjustment, removal, or installation of a door panel in a door system.