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Old 12-10-2010, 05:17 PM  
y-townxj
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Default Water in crawl space of small home

I recently bought, a 1200 square foot home, I pulled up the kitchen subfloor to repair some minor rot under the sink. I discoverd about 2 to 3 inchs of standing water under the kitchen, in the crawl space. So my question is what is my best soloution for this ? I would like to fix it before I reinstall the floor

1 One option I was considering was a sump pump

2 another was installing a french drain, or some type of underground irrigation system.

All responses are greatly appreciated, thanks



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Old 12-10-2010, 06:29 PM  
oldognewtrick
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If you can, post a pic of the area in the crawl space.



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Old 12-10-2010, 09:31 PM  
retiredhousemover
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what is the source of the water?

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Old 12-11-2010, 09:39 AM  
y-townxj
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I am pretty sure the source of the water is from the land around the house. The house appears to be in a low spot and when it rains the yard wil get very damp especially near the house.

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Old 12-12-2010, 11:18 AM  
itsreallyconc
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can't cost much to dig a diversion trench around the home, can it ? then you'll know !
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Old 01-09-2011, 12:45 PM  
joecaption
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If the grade under the house is lower then the outside grade then it's always going to be trouble.
A list of things to fix this problum.
Back fill with fill dirt until it's higher then outside grade, cover with 6 mil. black plactic held in place with 16" insulation hangers bent in half.
Add gutters with down spout leading away from the house, whenever possible when building something new and there's a grade we run the lines under groud to day light.
Add a french drain at the same time coat the foundation with foundation sealer.
Make sure to never have mulch piled up againt the house or a perminit flower box with no way for water to leak out of it. Even landscape timbers will make a pond for water to sit in.

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Old 03-24-2011, 04:02 PM  
cline
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Probably best to fill the crawl space with dirt to above ground level and also install drainage as far away as possible to stop water from standing outside the foundation wall. There are good diagrams and images at this waterproofing information (no affiliation). I did my own system outside and it works very well.

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Old 03-24-2011, 05:16 PM  
itsreallyconc
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are you serious - fill the crawl space with dirt ' ? ? ? that won't stop any infiltrating water,,, in 38yrs, i never heard of any pro ( waterproofer OR engineer ) recommend that method !
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Old 03-24-2011, 05:31 PM  
cline
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Water will pour into the lowest section it can find. It will entirely prevent the water from settling there. If the dirt in the crawl space is higher than the outside soil level you will not take on ANY water. It is the perfect fix.

Regarding the outside you should also have drainage as far away as possible from the house (this is not to stop water in the crawl, the above will fix that, it is to keep water away from your foundation and yard entirely.

No ADS. Use PVC with mud guard on the pipe and surround it with a foot of gravel.

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Old 03-24-2011, 05:40 PM  
itsreallyconc
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yes, it will,,, obviously you understand water runs downhill, takes the path of least resistance, seeks its own level, & rushes to fill a void ( if you don't believe that last part, try making a hole in a sink full of water ),,, in theory, there's no difference between theory & practice but, OFTEN, in practice there is.

in other words, loose fill soil won't resist **** - when you figure out how to compact the crawl space fill, perhaps you'll be kind enough to share it w/the rest of us

ps - this is the same reason wtr runs down the exterior walls of basements ( because the builder didn't properly compact the backfill ! )

pps - we use both hdpe ( ads brand ) & s & d pvc depending on the circumstances


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