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.
Water pressure under the flood can buckle the floor upward and possibly lead to collapse of the structure. Techniques are available to deal with this. Consideration also needs to be given to the possible entry of flood waters through sewer drains. One way valves can be installed to prevent sewer backflow. These and numerous other potential problems suggest the need for assistance from a professional specializing in floodproofing in all but the simplest cases.