Crawl Space Water

seif10mesSeptember 17, 2010

Hey all, quick questions for you drainage/waterproofing experts out there.

I recently purchased a house with some drainage issues. Biggest problem was downspouts spilling onto yard and water making its way below the house. I have corrected this problem by tying all spouts into a series of pipes that all dumps into a ditch out front.

However, we have experienced some heavy rain the past two weeks and there is still a good amount of water congregating in the low corner of the crawl below my vapor barrier. Sump pump has been running of and on the past week or so.

My question, as I am no scientist, can groundwater be actually forcing itself up through the dirt floor of the crawl? I see little evidence of water seeping through the block of foundation which makes sense because there is no more surface water pooling - coming from the ground up is the only other thing I can think of. If this is plausible - how would such a problem be remedied?

Thanks in advance!

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1) depending on where the groundwater table is and if your crawlspace is below exterior grade, then certianly water can come up from the ground.

2) If this is the case there's not a whole heck of a lot you can do about it, but the water should recede and go away on its own as the watertable returns to a typical level.

Hope that helps.

    Bookmark   September 17, 2010 at 9:08AM
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"...good amount of water congregating in the low corner of the crawl below my vapor barrier."

It the low point is below the water table water can easily rise up.

Adding some fill to the low point (gravel) under the vapor barrier, and then topping it with sand is about the only fix.

The sand is needed to protect the vapor barrier if you ever need to work in that area.

If the water subsides on its own without breaching the vapor barrier it should be fine.

The only long term issue I can think of would be repeated movement of a vapor barrier.

Plastic tends to stiffen with age and the movement could eventually cause cracking.

A repair would be needed at that point.

    Bookmark   September 18, 2010 at 10:32AM
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That was about the only solution that I could come up with. It will be a royal pain getting any amount of gravel through the tiny passageway, but I haven't been able to think of any other solutions. Thanks for the replies.

    Bookmark   September 24, 2010 at 7:17AM
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