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I (3) Reinforcements over windows and doors to withstand any water pressure. (4) A drainage, sump, and pump system should be behind the flood-resistant construction to collect any water leaks. b. System 2 (Figure 56): (1) A relatively impermeable membrane which extends into the ground a sufficient depth to prevent detrimental uplift and underseepage and is continuous from in the ground up the walls of the house. (2) A trough at ground level and against the membrane for storage of the membrane when it is not in use. (3) At places where the membrane passes walkways or other passageways and at the locations of pipes or other extrusions from under the building, construction techniques should be developed which are adequate and result in a pleasing appearance. (4) A drainage, sump, and pump system should be behind the flood-resistant construction to collect any underseepage or water leaks. c. System 3: (1) A relatively impermeable membrane placed at and below the foundation to prevent any detrimental underseepage and uplift. (2) The foundation and walls sealed by relatively impermeable coatings. (3) Relatively impermeable closures used over door and windows. (4) A drainage, sump, and pump system should be behind the flood-resistant construction to collect any water leaks. This system is probably most effective when installed by con- tractors who have become efficient in its construction. d. System 4. This system involves the use of low flood walls located at some distance from and around the building. 112. A prototype house should be tested using each of the four systems to give a clear demonstration that they are workable. 113. Cooperative efforts should be made with the public, contractors, material developers, and researchers to improve water-resistant construction as quickly and as efficiently as possible. 33