Basement Drying >> How To Get Water Out Of A Flooded Basement

a cross-section view of an exterior wall, shows one method of sealing masonry  walls with an asphalt-based coating that does not detract from their appearance. In this method, a new masonry veneer How To Get Water Out Of A Flooded Basement is added to the existing veneer after the coating is applied. In addition to maintaining the look of the wall, the new veneer helps protect the wall against damage from floodborne How To Get Water Out Of A Flooded Basement debris. atings is temporarily wrapping the entire lower part of the house in polyethylene film. This alternative is sometimes referred to as the "wrapped house” technique. How To Get Water Out Of A Flooded Basement The cross-section view in Figure 7-9 shows how this technique works. Polyethylene film is not a strong material – it cannot withstand water pressure on its own and it can be punctured fairly How To Get Water Out Of A Flooded Basement easily.
 
As a result, the How To Get Water Out Of A Flooded Basement following requirements must be met when the wrapped house technique is used:
 • The installation must How To Get Water Out Of A Flooded Basement be carried out very carefully. Even a small hole in the film will leak under the pressure of flood waters.
• The film must be applied directly against the walls How To Get Water Out Of A Flooded Basement of the house so that the walls, rather than the film, provide the resistance to water pressures.
• Where the How To Get Water Out Of A Flooded Basement film covers doorways and other openings, it must be backed by framed plywood panels that have been braced to resist water pressures. A temporary drainage system must be provided that will collect and dispose of any water that How To Get Water Out Of A Flooded Basement leaks through holes in the film. (Drainage systems are discussed later in this section.)
• The duration of flooding should be less than 12 hours and the flood depth adjacent to the house should not exceed How To Get Water Out Of A Flooded Basement 1 foot.
 
Only temporary, it does not change the normal appearance of How To Get Water Out Of A Flooded Basement your house. However, like any temporary technique, it requires extensive human intervention. How To Get Water Out Of A Flooded Basement All the necessary materials must be immediately available, and it will usually take four to six people several hours to put them into place. Therefore, you must have adequate warning every time flooding threatens so that you can install both the film and drainage system. Commercial versions of the wrapped house technique are available. Usually, they consist How To Get Water Out Of A Flooded Basement of a system of vinyl-coated nylon wrapping mounted on rollers, which are contained in boxes permanently installed in the ground around the perimeter of the house. To protect the house, you open the boxes, pull the How To Get Water Out Of A Flooded Basement material out, and attach it to hooks or clips mounted on the walls of the house. The primary advantages of these commercial systems are that they provide a stronger barrier and allow for a shorter installation How To Get Water Out Of A Flooded Basement time.
 
However, commercial house wrapping systems How To Get Water Out Of A Flooded Basement do not, by themselves, strengthen the walls of a house; if depths greater than 3 feet are expected, the walls must How To Get Water Out Of A Flooded Basement be adequately reinforced. Also, these systems do not eliminate the need for adequate drainage lines and sump pumps. Shields Shields are flood barriers placed over wall How To Get Water Out Of A Flooded Basement openings such as doorways and windows. Shields can be made of any of several materials, depending on the size of the opening to be covered. When flood depths are expected to reach the maximum allowable 2 to 3 feet, shields for openings wider than about 3 feet How To Get Water Out Of A Flooded Basement must be made of strong materials such as heavy-gage aluminum or steel plate (see Figure 7-10); shields for lesser depths and smaller openings can be made of lighter How To Get Water Out Of A Flooded Basement materials.
 
For example, small How To Get Water Out Of A Flooded Basement windows can be protected with shields made of plywood . Because blocking all doors and other openings permanently would be impractical, shields are usually placed How To Get Water Out Of A Flooded Basement temporarily, after flood warnings are issued. Smaller, lighter shields can be stored in the house and, when needed, brought out and bolted in place or secured in permanently How To Get Water Out Of A Flooded Basement installed brackets or tracks (see Figure 7-11). Larger, heavier shields may have to be installed permanently on hinges or rollers so that they can be opened and closed easily. Companies that specialize in flood protection devices can provide custom fitted How To Get Water Out Of A Flooded Basement flood shields. Usually, these How To Get Water Out Of A Flooded Basement commercial shields are made of heavy-duty materials, and some are equipped with inflatable or other How To Get Water Out Of A Flooded Basement types of gaskets that help prevent leaks. to using shields is to seal openings permanently. For example, a low-level window can be removed or raised and the How To Get Water Out Of A Flooded Basement opening bricked up or filled with glass block (see Figure 7-12).
 
Placing fill How To Get Water Out Of A Flooded Basement dirt against the wall and extending the fill to a distance of at least 10 feet from the wall will provide additional protection from flood waters. Sealants and shields How To Get Water Out Of A Flooded Basement provide the bulk of the protection in dry floodproofing, but they may allow some leakage, especially during floods of longer duration and when damaged by debris. How To Get Water Out Of A Flooded Basement They also do not protect against "under see page” – water that migrates downward along the sealed wall and then How To Get Water Out Of A Flooded Basement under the foundation. For these reasons, a dry floodproofed house must have a drainage system that will remove any water that enters the house through leaks in sealants and How To Get Water Out Of A Flooded Basement shields and any water that accumulates at the base of the foundation.
 
Depending on the How To Get Water Out Of A Flooded Basement permeability of the soils around and under the house, the drainage system may have to be designed to reduce buoyancy forces also. An adequate drainage system includes drains along How To Get Water Out Of A Flooded Basement the base of the foundation and under the floor. The drains consist of perforated pipe surrounded by crushed stone. The pipes collect water that seeps through the ground and How To Get Water Out Of A Flooded Basement channel it to a central collection point equipped with a sump pump. This system is shown in Figure 7-13. The sump pump must have sufficient capacity to handle the inflow of water and must have an emergency power source, How To Get Water Out Of A Flooded Basement such as a portable generator, so that it will continue to operate if conventional electric service is How To Get Water Out Of A Flooded Basement disrupted.
 
 Dry floodproofing a house will not protect service How To Get Water Out Of A Flooded Basement equipment outside the house. Examples of service equipment normally found outside the house are utility How To Get Water Out Of A Flooded Basement lines, air conditioning compressors, heat pumps, and fuel storage tanks. Chapter 8 discusses the protection of service equipment. Levees and floodwalls are both barriers that hold back How To Get Water Out Of A Flooded Basement flood waters, but they differ in their design and construction, appearance, and application. Levees How To Get Water Out Of A Flooded Basement are embankments of compacted soil. They usually have rounded outlines and can be blended into the natural landscape of the house site. Floodwalls are structures How To Get Water Out Of A Flooded Basement built of manmade materials, such as concrete and masonry. Although they cannot be made to look like a natural landscape feature, they can be designed and How To Get Water Out Of A Flooded Basement constructed in such a way that they complement the appearance of the house and its site.
 
 A levee requires more land area than a floodwall of How To Get Water Out Of A Flooded Basement comparable height; therefore, levees are less practical than floodwalls for small lots. Floodwalls, How To Get Water Out Of A Flooded Basement because of their design, construction, and more efficient use of space, not only can be How To Get Water Out Of A Flooded Basement built on smaller lots but also can be used selectively in conjunction with other retrofitting methods. How To Get Water Out Of A Flooded Basement For example, you can build a small exterior floodwall to protect an individual window or door in the wall of a dry How To Get Water Out Of A Flooded Basement floodproofed house.
 
You can protect a walkout-on-grade basement by building How To Get Water Out Of A Flooded Basement a floodwall that ties into the ground How To Get Water Out Of A Flooded Basement where the grade rises above the flood elevation on the sides of the house. This approach is illustrated in Chapter 3, in the sample cost estimate for levees and floodwalls. How To Get Water Out Of A Flooded Basement You can also build an interior floodwall to protect service equipment in the basement of a wet floodproofed How To Get Water Out Of A Flooded Basement house (see Chapter 8).

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