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<br />PART III: SEALING MATERIALS <br /> <br />Introduction <br /> <br />24. Materials and systems which may be used to make homes and buildings <br /> <br /> <br />more resistant to the penetration of floodwaters should be included in a home- <br /> <br /> <br />owner's manual. Homeowners should be provided as many options as possible for <br /> <br /> <br />making a house or building resistant to the penetration of floodwaters. A <br /> <br />manual would permit the owner of a home or building to consider various <br /> <br /> <br />methods and materials which have been proven to be satisfactory and to select <br /> <br /> <br />a system which best meets his needs. <br /> <br />25. In many cases it is desirable to have a coating which will make a <br /> <br /> <br />wall relatively impermeable to a head of water; therefore, it was decided to <br /> <br /> <br />test available materials and determine their effectiveness. The materials <br /> <br /> <br />were tested to determine if they made brick-veneer walls relatively imperme- <br /> <br /> <br />able to a water head and to determine their durability under environmental <br /> <br /> <br />conditions over several years. <br /> <br />Test Specimens <br /> <br />26. Test walls were needed for the application of the coatings and to <br /> <br /> <br />build prototype walls and bulkheads in order to test the coatings would have <br /> <br /> <br />been very expensive. Brick cubes open at the top would be economical and <br /> <br /> <br />expedient specimens on which to test the coatings. Therefore, eight 2- by <br /> <br /> <br />2- by 2-ft cubes and one 4- by 4- by 4-ft cube (Figure 21) were built for <br /> <br /> <br />testing the coatings. <br /> <br />27. The cubes were used to test the coatings in several ways. Coatings <br /> <br /> <br />were put on either the inside or outside of the cubes which were then filled <br /> <br /> <br />with water to test the effectiveness of the coating against a direct or <br /> <br /> <br />reverse water head. The larger cube was used to test materials and systems by <br /> <br />placing water on the inside of the cube and also by building a bulkhead on the <br /> <br /> <br />outside to have a water head acting from the outside inward. <br /> <br />11 <br />