This room contains listings for panel-style closures that can be used to block opening (window and doors) in dry floodproofed buildings and in barrier systems. It also includes water-tight doors that resemble panels but may be somewhat more complex. It does not include water-inflatables and multipart closures; these are grouped with Demountable Barriers.

Most floodproofing systems have openings that need to be closed and watertight during a flood. A panel closure is any flat, firm sheet material used to block one of these openings. It may be plywood, aluminum, steel, wood planking, Plexiglas or any rigid material. It can be permanently attached or designed to be set in place quickly in an emergency. Some reside underground and float into place. An opening that needs a closure may be completely clear, such as for a driveway. It may be partially blocked with a door or window that needs additional protection; water will usually leak between a door or window and its frame and between the frame and the wall. More on panel closures.