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Old 04-08-2010, 09:52 AM   #1
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My crawlspace is flooded - how to drain adequately?


I accept it might not actually BE possible to drain properly or prevent at the moment, for one thing, but it's worth asking.

So - my crawlspace is about 20 inches high - the ground is lined with plastic sheeting and the ground slopes downhill west to east. The lower end (east side - to the center of the house) is below ground-level. The crawlspace 'door' - which is just an opening with no real door attached - is in at the lower-end.

Yesterday, when I was under the house doing plumbing, it started to rain - and not just a LITTLE rain but a TON of rain. In fact, our town flooded during the storm - and so did the lower end of the crawlspace. The water seemed to seep in through the bricks and rushed in through the crawl-door.

The ground is still so saturated that it's a mudpit in my yard and the water under the house has no where to go - so it's just sitting there. So - I have a pump - however - with the surrounding area being SO saturated I have a feeling that pumping it out won't do any good.

Now, if I didn't have disconnected drains (kitchen sink, for example) that I'm in dire need of connecting to use then I wouldn't worry right now - and I'd just wait a few days for it to drain before going under for more work - but since my sink is disconnected I MUST do something to gain access without swimming.

Who else has to deal with this type of crawl-flood issue and how might I be able to prevent it? My thought is to apply a coat of mortar to the outside brickwork and then seal it off - and build a tight frame around the crawl-door and fit it with a sealed door of some nature but, honestly, that seems so extreme that it doesn't sound like it'll work and be worth the time.

Is it common or a big deal for crawls to flood?

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Last edited by Snav; 04-08-2010 at 09:55 AM.
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Old 04-08-2010, 10:44 AM   #2
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My crawlspace is flooded - how to drain adequately?


If the water table is high then pumping won't do much
Water will just seep back in
Digging down on either side of the house & putting in drainage would help
Was the back yard area flooded ?
Or the water was just drianing off into the lower crawl space ?

My last house had a crawl space & flooded on a reg basis
Since there wasn't anything down there I never bothered doing much
I did dig a sump pit & install a submersible pump
That way I coud pump it out if needed

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Old 04-08-2010, 12:05 PM   #3
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My crawlspace is flooded - how to drain adequately?


1. You need to grade the land so water does not gravitate towards the house.

2. You need to pump out the water faster than it comes in.
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Old 04-09-2010, 09:49 AM   #4
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My crawlspace is flooded - how to drain adequately?


Well, I pumped out the water and it didn't re-fill so I was able to do more plumbing, yesterday.

I'll have to put this problem on the to-do list. I have landscape plans that I'll get to one of these years and this will be incorporated into that.
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Old 04-09-2010, 09:59 AM   #5
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My crawlspace is flooded - how to drain adequately?


constant moisture in a crawl is bad for all sorts of things
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