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<br />92. During the time when contractors are actively striving to develop <br /> <br /> <br />and to implement better techniques, the Corps of Engineers can play an <br /> <br /> <br />important role through transfer to both the contractor and homeowner its <br /> <br /> <br />continued research and technology. <br /> <br />Flood-Resistant Systems <br /> <br />93. In addition to the more common raising of structures and construct- <br /> <br />ing levees and walls, several other types of flood-resistant systems are being <br /> <br />installed to prevent flood damage to homes and buildings. The author believes <br /> <br />that a drainage, sump, and pump system is essential for any of the flood- <br /> <br />resistant systems. <br /> <br />94. One system being installed uses the following procedure: <br /> <br />a. Dig around the perimeter of the building to expose its founda- <br />tion, then seal any cracks in the exposed foundation. <br /> <br />b. Apply a cementitious waterproofing material to seal the founda- <br />tion and wall of the house to the desired flood-resistant <br />elevation. <br /> <br />c. Place waterproof closures over openings such as doors and <br />windows. <br /> <br />d. Construct a curtain wall below the level of the foundation to <br />such a depth that the building will be protected from uplift. <br />The seepage path will have to be of such length, considering <br />the given characteristics and conditions of foundation soil, <br />that for the length of time of the flooding the seepage <br />obtained under the building will not be harmful. <br /> <br />95. A second system to make houses and buildings resistant to flood- <br /> <br />waters involves extending an impermeable membrane several feet into the ground <br /> <br />and up the wall of the building to the desired floodproofing elevation <br /> <br />(Figure 66). A trough or container is attached to the outside of the imperme- <br /> <br />able membrane and to the house at the ground level. The upper part of the <br /> <br />membrane can be dropped down into the trough, and a lid can be put on the <br /> <br />trough for the storage of the membrane. When floodwaters are rising, the lid <br /> <br />of the trough can be removed and the membrane pulled upward and attached to <br /> <br />the house. There are problems with this system still to be solved; i.e., the <br /> <br />membrane has to pass doorways, pipes which extend from under the house, etc. <br /> <br />All of these passageways or penetrations (such as by pipes) must be cared for <br /> <br />to ensure that leaks can be eliminated and a pleasing appearance maintained. <br /> <br />28 <br />