Basement Drying >> How To Fix Drywall In A Flooded Basement

Good Drainage
For best results the footing drains should "daylight", meaning the pipes that carry the water away from the footing drains should slope away from the house and discharge the water to land How To Fix Drywall In A Flooded Basement surface some distance downhill from the basement. The basement floor should rest on a bed of gravel, and the gravel should have perforated drain pipes laid in it to prevent any water from accumulating beneath the basement floor.
 
 Like the footing drains, the floor drains should also "daylight".The figures below show cross-sections of basements with effective drain systems, and without suitable drainage. Poor Drainage, Some contractors forgo using gravity drains beneath How To Fix Drywall In A Flooded Basement the basement floor,and instead installone or more sumps in the floor which can be equipped with sump pumps. The sump pumps remove the water that accumulates in the gravel bed beneath the basementbefore it can cause a seepage problem.
 
 In some cases, sumps can be added in older basements to help alleviate seepage problem. Sump pumps can be very effective in preventing wet basements. However, they are mechanical devices that operate on electricity. If they fail, or if How To Fix Drywall In A Flooded Basement service is disrupted, the result can be a wet, or even flooded, basement. A backup sump pump is recommended, and also a high water-level alarm to alert the home owner that the sump pump is not functioning is an inexpensive precaution.
 
 A portable generator, which must be placed outdoors, may also be a worthwhile investment to keep the sumps operating during power outages. Wet basements are How To Fix Drywall In A Flooded Basement more of a problem in houses that are on very flat land where walk-out basements cannot be used. It is often difficult to construct basement footing and floor drains that "daylight" to land surface in these types of homes.
 
Typically either a dry well (a gravel-filled pit where the drainage from around the basement is channeled) or sump pumps are used to drain the water from the drainage system. How To Fix Drywall In A Flooded Basement Unfortunately, many home builders do not take the necessary steps to prevent basement leakage. Footing and floor drain tiles, gravel, vapor barrier, and the labor to install them, are not terribly expensive. Yet, a surprising number of homes are built with inadequate or ineffective drainage systems.
 
 Adding footing drains to an existing dwelling is considerably more expensive than doing it when the home is built. There are several things a homeowner can do How To Fix Drywall In A Flooded Basement to help decrease the potential for basement leakage. Rain gutters and downspouts must be used to help prevent roof runoff from accumulating around the basement walls. Two inches of rain falling on a 1,500 square foot roof will produce about 1,870 gallons of water.
 
 If that amount of water is allowed to drain off a roof and collect around a house, it can overwhelm even a properly installed basement drainage system. Gutters and downspouts are How To Fix Drywall In A Flooded Basement critical to maintaining a dry basement. The downspouts should empty on the undisturbed soils beyond the backfill around the basement. The land should be sloped away from the house on all sides.
 
A commonly recommended minimum slope is at least 1 inch of vertical drop for each foot of horizontal distance. Homes built on steep slopes commonly have basement leakage problems on the uphill side of house. To minimize dirt work, contractors commonly How To Fix Drywall In A Flooded Basement leave the yard on the uphill side of the house very flat. If there is not adequate drainage around the basement, the water will tend to saturate the soil materials and pond against the basement wall on the uphill side of the house.
 
 Landscaping to channel water away before it reaches the house will help alleviate the problem. Installation of soil drains such as a French drain may be necessary to reduce the buildup of moisture in flat areas. Homes constructed on footings and How To Fix Drywall In A Flooded Basement foundations can also experience water problems similar to those associated with poorly drained basements. Typically, the footings are poured a few inches below the frost line, and the foundations are short walls that rest atop the footings, much like basement walls rest on their footings.
 
Footing drains should be placed around the outside of the structure to intercept water in the soils, and direct it away from the building. Otherwise, water may How To Fix Drywall In A Flooded Basement move beneath the footings and surface in the crawl space beneath the house. There are, of course, places where the water table is only a few feet below land surface.
 
The water table is the boundary between unsaturated materials above it, and water-saturated materials below it. The water table is typically closest to land surface in low-lying areas, and a greater distance below land surface on higher ground. Basements are generally not recommended where homes are constructed on floodplains How To Fix Drywall In A Flooded Basement unless the basement is essentially built on top of the ground and an artificial "hill” of fill is placed around it.
 
 During dryer times of the year when stream flow is low, the water table beneath a floodplain may be well below the typical depth of a basement, but other times of How To Fix Drywall In A Flooded Basement the year when the stream is at a higher stage, the water table may rise to only a few feet below land surface. If this occurs, the basement may have much more serious problems than leakage, the hydrostatic pressure may cause the floor to buckle or walls to bulge or collapse.
 
 A 40-ft long basement wall with 5 feet of water on the outside of it would have to withstand an external pressure of about 31,000 pounds. A basement floor beneath a 1,200 How To Fix Drywall In A Flooded Basement square-foot house under the same conditions would have to withstand an upward hydraulic pressure of nearly 374,000 pounds. Basement water problems can occur in rural as well as urban areas.
 
 But other types of excessive water problems are predominantly found in developed areas, especially those where extensive landscape modifications have been made that alter surface drainage patterns, and where dwellings are closely spaced. How To Fix Drywall In A Flooded Basement Surface-water runoff is a natural result of rainfall, but surface-water runoff rates and amounts change when the landscape is modified. The addition of streets, driveways, buildings, patios, swimming pools, etc., creates impervious areas where surface water can no longer infiltrate.
 
 The greater the impervious area, the greater the runoff. In carefully planned developments, these drainage changes are mitigated by the addition of storm sewers, drainage ditches, storm-water detention basins, or other structures that carry much How To Fix Drywall In A Flooded Basement of the excess runoff away from the development or store part of the runoff for later release. Drainage in many developments receives less attention, and the result is greater than normal runoff occurring in the higher parts of the development, and the excess water flowing to the lower elevations in the development.
 
The problems are almost always transferred downhill. If the lots in the lower areas are notched How To Fix Drywall In A Flooded Basement into the hill sides, then the nearly flat yards below the over-steepened slopes may receive so much water that they stay wet for long periods of time.

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