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Question DetailsAsked on 2/10/2018

Looking for someone who can find ground water under slab that is seeping into our closet in Shreveport bossier area

We have water seeping into our closet. Seems to be after rain. Thinking it is ground water under slab. Who do we call to find this in Shreveport bossier area

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2 Answers

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Since it is related to rain, and sounding like you have a slab-on-grade home (so the closet floor should be at or above surrounding ground level), the solution is to just regrade outdoors and/or put in gutters.


Gutters with proper downspouts leading the water away from the house to a location where it will not flow back toward the house, will remove a large portion of the water falling on/immediately around your house.


Then, dropping surrounding ground surface well below top of slab (typically 6 inches is recommneded, but not below bottom of slab) and then regrading for typically 3-6 feet (depending on soil permeability around the house is good practice. 3 feet generally good in clayey/silty areas, 6 feet better in sandy/gravelly areas) so the ground slopes away from the foundation to drain water away from the house immediately upon falling. Slope should be at least 2% (about an inch every 4 feet) and preferably more like 8-10% (an inch drop per foot or so) to promote fast draining in heavy rains. Combine that with compacting relatively impermeable soil (clayey/silty) for the few feet right near the foundation (for houses with basements only) can get any waer away from the foundation - hence, end of problem from rainwater infiltration.


In areas where the house is lower than surrounding ground this may mean regrading at a slopeaway from the house for 6-10 feet to a swale dug in the yard to collect and drain away the water. Or putting in (for a lot more cost) a french drain around the house which then drains away runoff water to a point where it will continue to drain away from the house an a lower elevation.


If the problem is high groundwater level, the surface drainage to get the surrounding ground level down below the bottom of the slab will solve the problem unless you have an actual spring under there, in which case either a surrounding deeper swale or french drain, or installing a sump pump or trying to grout it off (last resorts) may be needed. [Generally grouting is a lost cause in cases like this with slab-on-grade - would likely just pop up elsewhere under the house, so intercepting high groundwater levels with a deep swale or french drain leading to lower elevation(so it drains out the groundwater and lowers the water table) around the house is rarely necessary - basically making the house a dry island in the water table.


One other possibility - check around the outside of the house outside the closet to be sure you do not have a place where the siding is damaged, or where the siding and associated dripedge does not exted below the top of the slab, so siding runoff may be getting on top of the edge of the slab and coming in that way.


Considering your locale, if you are in a drainage control district or near a levee, you may need a special permit to do any swale or french drain construction, if needed, so you do not adversely impact their function. Check with local Planning and Zoning department - and of course any discharge area, if not into an existing natural sruface runoff flow area, has to be planned to not adversely impact neighbors by flooding them out.


Here are links to a number of similar questions with answers in more detail about controlling surface water or very shallow groundwater around your house:


http://answers.angieslist.com/water-s...


http://answers.angieslist.com/The-sla...


http://answers.angieslist.com/Can-det...


http://answers.angieslist.com/I-water...


http://answers.angieslist.com/Water-I...


http://answers.angieslist.com/Water-s...


http://answers.angieslist.com/Water-s...

Answered 9 months ago by LCD

0
Votes

Forgot to mention -


You can find a LOT of other previous questions with checklists and suggestions about remedying basement water infiltration issues - almost always remedying the situation OUTSIDE the house, and preferably before the water gets against the foundation, is the best solution. Check them out in the Home > Basement Waterproofing link, under Browse Projects, at lower left.

Answered 9 months ago by LCD




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