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Concrete Basement Floor Heaving up

TomM1's picture

I have been to several houses and a community center and there were areas of the concrete floor that has heaved upwards by as much as 5 or 6 inches.

What would the cause be? I am afraid that If I just reconcrete that section without addressing the underlying problem,we may have to fix that defect again.


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(post #63459, reply #1 of 10)

swelling clays

(post #63459, reply #2 of 10)

What causes the clay soil to swell?

(post #63459, reply #3 of 10)



Warning! Be cautious when taking any framing advice from me. Although I have a lifetime of framing experience, all of it is considered bottom of the barrel by Gabe. I am not to be counted amongst the worst of the worst. If you want real framing information...don't listen to me..just ask Gabe!


keep looking for customers who want to hire  YOU.. all the rest are looking for commodities.. are you  a commodity ?... if you get sucked into "free estimates" and  "soliciting bids"... then you are a commodity... if your operation is set up to compete as a commodity, then have at it..... but be prepared to keep your margins low and your overhead  high...."

From the best of TauntonU.

(post #63459, reply #4 of 10)

Would the fact that the weeping tiles have failed cause or worsen this problem?

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Oh Well,

We did the best we could...

(post #63459, reply #6 of 10)

Since you don't have any profile info, I can't tell what part of the country you are in.  If the facilities are subject to freezing conditions, there is a possibility that the expansion that occurs when water changes state to ice could also be responsible.  Most basement floors should be designed to be floating pads, resting their edges on the inside of the footing, and able to rise up in the event of an unforseen expansion. 

Les Barrett Quality Construction


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(post #63459, reply #8 of 10)

Hydrostatic pressure indeed.  Are you sure that these buildings weren't built on an underground spring? Perhaps a deep-buried, large sewer pipe that has cracked/opened? Been known to happen.


Tim Ruttan

(post #63459, reply #9 of 10)

In the area I live in, one of the contractors just bought back his second house.  First one he had to buy back, homeowner noticed the basement floor elevation  changed by, oh, 4 to 6 inches.  After much dithering, homeowner hired a lawyer, and contractor bought back the house.  After removing the basement floor, and putting in some halfassed drainage, he re sold the house.

The latest one, I see that he has removed one whole basement wall; the back of the house is up on steel beams while he rebuilds the basement.

Oddly enough, in the houses built by other contractw who use proper perimeter drainage around the outside of the foundation, there are no water problems.

(post #63459, reply #10 of 10)

i bielieve i can solve your problem and keep it solved, non intrusive, not waterproofing, used by military, us treasuary. govts, etc.