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Old 12-22-2010, 04:04 PM   #1
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relevel a foundation on outside from underneath


our house is 35yrs old & is starting to settle in the kitchen area.it is noticeable from outside by looking at the brick.the tiles in the floor are also separating;i want to add another room from here but want to level the foundation first.i have heard to dig under where the corner is and use jacks underneath til it looks good & then fill it with concrete.does this sound right?

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Old 12-22-2010, 04:15 PM   #2
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relevel a foundation on outside from underneath


You need to supply a lot more information before asking such a broad question. Specifically, exactly what type of foundation do you have? How much settlement has occurred, and how accurately did you measure? What type of framing do you have in the house? What type of soil is the house on? How is the interior of the house constructed? You get the idea. Else the question is impossible to discuss.

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Old 12-22-2010, 04:21 PM   #3
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relevel a foundation on outside from underneath


4inch concrete foundation .the wood frame is on 19 inch centers
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Old 12-22-2010, 05:01 PM   #4
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relevel a foundation on outside from underneath


Is it bigger than a breadbox?

Seriously, this is a huge project and discussing it one word at a time is going to take a LONG time.

Yes, in theory you are correct. "All you have to do" is excavate under the foundation or footer. Raise it to the correct height and underpin it with a new footer.

But that is equivalent to saying all you need to do to get to the moon is "go that way really fast. If something gets in your way, turn" (Thumbs up for the obscure 80's movie ref).

4" of concrete is likely your slab. Your best bet is to start with a couple of books on foundations. At the MINIMUM for starters, you'll need,

1. How deep has it settled? Is it still settling? How do you know? Is it worth x thousands of dollars in rehab to pick up 3/4" level.

2. Your type of footing and its depth
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Old 12-22-2010, 05:05 PM   #5
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relevel a foundation on outside from underneath


If it is a slab then pump jacking could be an option. They drill holes and pump concrete under the slab to raise it back up to level.
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Old 12-22-2010, 06:12 PM   #6
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relevel a foundation on outside from underneath


no bsmt mentioned - you MIGHT have a 4" slab but its also likely its a monopour/unipour/thickened edge footer ( foundation ),,, just my suggestion you call in a pro engineer - you'll need accurate measurements, cores of the floor to ck thickness, determine if its a post-tensioned slab, mono/uni/te, excavation, etc,,, what you mentioned is an underpinning which may OR may not be the right choice/method

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