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<br />~ <br /> <br />Water-Resistant Building Materials <br /> <br />. <br /> <br />Marine plywood <br /> <br />The most water-resistant plywood; it can be used for floor- and exterior-wall sheathing. ' <br /> <br />Exterior-grade plywood <br /> <br />Meant to resist low-level moisture, humidity. Not for water saturation conditions. <br /> <br />Manufacturers do not consider greenboard (moisture-resistant dry wall) to be a <br />floodproofing material. It can be submerged for several hours without extensive deterioration <br />and it is only slightly more expensive than normal plasterboard. <br /> <br />Greenboard <br /> <br />Rigid (closed-cell) insulation <br /> <br />Will not deform or lose its insulative <br />properties when wet. Can be dried out <br />and reinstalled in wall or floor cavity. <br />Use instead of fiberglass insulation. <br /> <br />Synthetic baseboards <br /> <br />Use instead of wood base. <br /> <br />Galvanized nails <br /> <br />Will not rust after being saturated with <br />floodwaters. Use at all locations up to <br />three feet above flood level. <br /> <br />Metal doors <br /> <br />Will not warp if saturated. The door <br />may rust in spots, but this can be <br />sanded out and repainted. Use at all <br />doors, especially exterior. <br /> <br />Metal windows Will not warp if saturated. Will need <br />cleaning and oiling after a flood. <br /> <br />Building Materials to Avoid <br />When Floodproofing <br /> <br />Fiberglass or cellulose installation <br /> <br />Cork or corkboard <br /> <br />Gasoline, motor oil, weed killer, pesticide, lye, <br />drain clear, swimming pool and other chemicals <br /> <br />Linoleum <br /> <br />Particle board, plywood, chipboard, fiberbo~ <br />paperboard, straWboard, Masonite panelin.. <br /> <br />Wallboard, plasterboard, dr}wall, gypsum <br /> <br />Wallpaper <br /> <br />Sheet vinyl flooring or tile Adheres to marine or pressure treated plywood underlayment with waterproof adhesive. <br /> <br />Indoor and outdoor carpet Use with synthetic carpet pad. Do not permanently fasten down. <br /> <br />Aluminum drywall screws Will not rust and will allow easy removal and reassembly of interior walls. Use instead of <br />standard drywall nails. <br /> <br />Brick, concrete Not damaged by water saturation, but must be used in conjunction with a waterproof <br />membrane. <br /> <br />Plastic wood Made of recycled plastics in matching shapes of dimensional lumber. Waterproof and <br />dimensionally stable. Use for foundation and wall framing members. <br /> <br />Pressure-treated lumber/plywood Relatively stable in water saturation conditions. Will not sustain heavy damage bua <br />warp. Plywood second only to marine plywood in water-resistance. Use at allllood-I~ <br />Moisture-resistant material below the IOG-year-flood level. (Note: If treated lumber is used, <br />protective gloves must be worn during installation, and a protective barrier such as drywall <br />must be placed between the treated lumber and living space.) <br /> <br />Protecting tour Home from Flood Damoge, Revised 1996. 2nd Edition. <br />Fedcr<i.l Emery:enc'l .lIlan~cm('nt All.enc\" <br /> <br />6 <br />