Basement Drying >> The Best Ways To Dry Out A Flooded Basement

If your house has been substantially damaged or is being substantially improved, your community’s floodplain management ordinance or law will not allow you to have a basement, as defined under the National Flood Insurance Program (NFIP). The NFIP regulations define a The Best Ways To Dry Out A Flooded Basement asement as "any area of a building having its floor subgrade on all sides. 

If your house has such a basement, you will The Best Ways To Dry Out A Flooded Basement be required to fill it in as part of any retrofitting project. Note that the NFIP definition of basement does not include what is typically referred to as a "walkouton-grade basement, whose floor would be at or above grade on at least one side. 

As barriers, levees and floodwalls can block The Best Ways To Dry Out A Flooded Basement access to your house. If you build a levee or floodwall, you will usually need to provide openings or other means of access for driveways, sidewalks, and other entrances, but any opening in a floodwall or levee must be closed when flooding threatens. A variety of closure mechanisms are available. 

For floodwalls these include shields similar to those used in dry floodproofing (as described earlier in this chapter) that are hinged to the wall or The Best Ways To Dry Out A Flooded Basement designed to slide into place. Prefabricated panels stored elsewhere when not in use are also acceptable (see Figure 7-16). 

Acceptable closures for levees include permanently mounted, hinged or sliding flood gates and The Best Ways To Dry Out A Flooded Basement prefabricated stop logs or panels. An alternative to incorporating openings is to provide a means of crossing over the top of a levee or floodwall. If a levee is low enough, a ramp can be created with additional fill material. 

Similarly, a stairway can be built over a low floodwall, as shown in Figure 7-17. human The Best Ways To Dry Out A Flooded Basement intervention. Your levee or floodwall will not protect your house from flooding unless you are willing and able to operate all closure mechanisms before flood waters arrive. 

Building a levee or floodwall around a house keeps flood water out of the protected area, but it can also keep water in – water that The Best Ways To Dry Out A Flooded Basement collects from rain or snow and from seepage during floods or, in the worst case, water that overtops the levee or floodwall. 

Two methods of removing this water should be used for all levees and floodwalls: drains and sump pumps. The Best Ways To Dry Out A Flooded Basement Drains installed at the base of a levee or floodwall allow collected water to flow out of the protected area. 

The outlets of the drains must be equipped with flap valves that close automatically during flooding to prevent flood water from backing up through the drains into the The Best Ways To Dry Out A Flooded Basement protected area. An electric sump pump should be installed at the lowest point inside the protected area. 

The pump must have an adequate capacity – it must be able to remove water from the The Best Ways To Dry Out A Flooded Basement protected area faster than water enters. An emergency power source, such as a gasoline-powered generator, should be provided so that the pump will continue to operate during interruptions in electrical service, a common event during a flood. 

Whenever The Best Ways To Dry Out A Flooded Basement possible, the downspouts from the roof of the house should be directed over the levee or floodwall so that they will not contribute to the collection of water in the protected area. Inspection and Maintenance After a levee or floodwall is constructed, you must inspect it periodically and make whatever repairs are necessary. 

Otherwise, small problems, such as The Best Ways To Dry Out A Flooded Basement settlement, cracking, loss of vegetation, and minor amounts of erosion and scour, can quickly become major problems during a flood. At a minimum, you should perform these inspections each spring and fall, before each impending flood if you have adequate warning, and after each flood. 

Protecting Service Equipment Protecting a house with a levee or floodwall also protects any service equipment inside the house. Also, when levees and floodwalls protect not The Best Ways To Dry Out A Flooded Basement only the house but an area around it as well, service equipment mounted on exterior walls, such as an electric meter, and equipment installed near the house, such as an air conditioning compressor, will be protected. 

But any equipment outside the protected area must be relocated, elevated, or anchored. Chapter 8 discusses the The Best Ways To Dry Out A Flooded Basement protection of service equipment. Levee Construction The design professional must conduct an analysis of the soil at the site to determine whether it is adequate for use in the levee and to anticipate any foundation and seepage problems. 

When you construct a levee, you should try to take advantage of the natural terrain around your home. Depending on the topography of your lot, the levee may not have to completely encircle your house. You may be The Best Ways To Dry Out A Flooded Basement able to build the levee on lower ground and tie the ends into higher ground. 

An advantage of this technique is that the levee can often be made to look like part of the natural topography of your lot. In preparation for construction, all ground vegetation and topsoil should be removed from the The Best Ways To Dry Out A Flooded Basement levee site. Sod should be set aside so that it can be used on the surface of the levee after construction. 

The levee should be built up in 6-inch layers, each of which must be compacted. If there is a shortage of impervious soils in the area, the levee can be built with an The Best Ways To Dry Out A Flooded Basement impervious core and the available permeable soils can be used for the outer part of the levee, as shown in Figure 7-18. The core can be made of impervious soils or another type of water-resistant barrier. 

The core will minimize The Best Ways To Dry Out A Flooded Basement seepage through the levee; however, the use of permeable soils on the outside of the levee will require that the angle of the side slopes be reduced so that scour and erosion are minimized. This is an important If the soil underlying the levee is highly permeable, an impervious barrier may have to be constructed below the levee to control foundation seepage. 

Several types of The Best Ways To Dry Out A Flooded Basement barrier designs are available, but they are normally used for major levee projects and would usually be too expensive for a homeowner. The analysis of the soil at the site will reveal such problems. As noted earlier, the height of the levee will depend on the FPE and the need for at least 1 foot of free board. 

Also, the levee should be built at least 5 percent higher than the desired elevation. This additional height will compensate for settlement of the soil that occurs naturally after construction. Levees are constructed with compacted layers of soil. When an adequate amount of impervious soil is not available, the levee can be constructed of permeable outer soils and an The Best Ways To Dry Out A Flooded Basement impervious core.

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