For a house that’s susceptible to flooding, the Flood Barrier Shield could spell the difference between cleanup and reconstruction. It features a removable aluminum panel that slides into pre-mounted channel brackets and seals with neoprene gaskets. The brackets can mount on the outside of the door or inside of the frame. Each unit is made to order, so custom sizes are not a problem. Costs run about $50 per square foot. Zero International, 800/635-5335, floodbarrierfordoors.com