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pnalley

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Reply with quote  #1 
I have seen houses n basements and crawls that have those metal jackstands to level a house off. The otehr day I inspected a house on a slab that had settled and been repaired. They have taken out a 3 by 10 ft wide place in the LR, a 3x8 in a bedroom. There were multiple 2 inch holes that had been drilled through the slab. They apparently used these access points to put more concrete under the house.

Has anyone ever heard of that? Or seen it? Once they install new floor covering it would be hidden. On small crack in the wall near a bedroom door, but that could easily be hidden wit a but i tape, mud & paint

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treskirkland

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Reply with quote  #2 
I just had this done on my front stoop, they drilled a couple of holes and used pressurized concrete to raise it up.  I'm not an engineer, but it seems like the same would work for a slab.  I would Google it and see what you find.
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Meatloaf

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Reply with quote  #3 
I would think it would be a temporary fix that may last a long time but not forever.  Eventually whatever happened to make the soil move in the first place will happen again.  

99% of the "settlement" issues we see are mountains made of mole hills.  So the house has a small crack in it.  It still functions properly....  Its still livable.  Yet, we make a huge deal out of it.

In the case of pumping concrete under a slab, I wouldn't think it would be possible to pressurize the concrete enough to "lift" a house, but you may be able to fill in a gap to prevent additional settling.

That being said, I have seen a house on a slab lifted up and re-located... Slab and all.  I wouldn't believe it if someone told me about it, but I have seen it with mine own eyes.

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Meatloaf

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Reply with quote  #4 
I've also seen a cabbit.
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MEP

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Reply with quote  #5 
Yes, it is a good fix if (like everything) is done by a qualified person...structural engineers are good source of information for this kind of stuff

... concrete slab leveling, or "slab jacking," is a method by which concrete is poured or pumped under an ... Professionals have long used mud jacking to improve and level foundations

Check out Google

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billcassidy

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Reply with quote  #6 
I had cracks in my unfinished basement floor, few, but then started getting cracks in the walls, then more in the floor. So first was calling the people that do the jacks on the corner of the house, but my across the street engineer neighbor told me no, no, no, you need to call an engineer that pumps concrete under the slab. The engineering company he works for had just done this to a large industrial building that stored tires and the floor was cracked and sinking.  In my case the floor was not sinking.  So contacted a company, they drilled probably 10-15 small holes in the floor (in various locations), filed them until the concrete comes back up out of the hole.
This was about seven years ago and I have had no further movement or new cracks, I am very pleased.
I asked them to do the garage floor which had a few cracks, they drilled two different holes, but the concrete immediately came back out the hole.
I had a place on the front lawn that kept sinking (slightly) and was told by a neighbor that the builder used my lot to bury some limbs.  So I had them pump some concrete in the front yard as well and the sinking has stopped there as well.
I could see just a little of this when I was purchasing the house and told the "inspector" that I was worried about it and he said "Oh, no problem".
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BillDing

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Reply with quote  #7 
What??  you pumped concrete in the yard?  
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Meatloaf

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Reply with quote  #8 
Quote:
Originally Posted by BillDing
What??  you pumped concrete in the yard?  


He should have just built a fence around where it was sinking... Right??

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