Passive floodproofing is more difficult and expensive in some cases but avoids questions about whether the floodproofing measures will be effective when needed. Unless the structure being floodproofed is staffed on a 24-hour basis, passive floodproofing may be the best choice. However, this depends on circumstances and the amount and complexity of effort required to put active floodproofing measures into effect. A homeowner may, for example, permanently block basement windows and other low openings and need to take action only to put a barrier over the front door. Cover plates for openings may be made of wood, plastic, aluminum, steel or other appropriate materials.
Weight is a consideration if the covers are to be stored away from their place of use.
Alternatively, covers can be hinged to the building and swung back out of the way during dry periods, ready for immediate use. Another approach is to mount heavy covers on sliding door track to ease moving them into position. Larger cover plates normally are sealed with a gasket and bolted tight. Homeowners might consider doing this with a tube of sealant and a handful of nails. Consideration also needs to be given to basement floors when floodproofing.