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Old 09-12-2006, 02:05 PM   #1
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sunken garage floor


I have a section of my garage floor that has sunken approx 1 3/4 inches. It's in a triangular shape with the widest section about 3 ft and the longest section about 3 3/4 ft, located in the front corner of the garage. It does not get a lot of traffic. I'd thought about self leveling concrete but it doesn't match and would look tacky and amateurish. Can I use concrete patch to level this out or would it be better to bust it up and pour in new?


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Old 09-12-2006, 07:40 PM   #2
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sunken garage floor


You would first need to find out why it has sunken. And if it has stablized.

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Old 09-12-2006, 09:02 PM   #3
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sunken garage floor


I believe I would bust the sunken floor section out, and the fill with sand and use a rammer to pack it, then re-pour it...unless it is indictive of a greater problem...one way or the other, you will need to address the issue.
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Old 09-13-2006, 03:30 AM   #4
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sunken garage floor


Third vote.

Find out WHY this is happening before you put a 'band-aid' over the real problem...

Good Luck
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Old 09-13-2006, 12:11 PM   #5
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sunken garage floor


I saw house with surrounding interlock sunk to irregular level as well... don't know if this is ever fixable.. say the reason may be movement of soil under the house due to mother earth getting a blink in her eyelips... so what can you do...

may be rather than finding out why... more practically, need to find out if the movement stopped... then the question should really be,

anyone know a good mechanism to check this out... may be pourl a particular type of chemical on top, after one month, if it changes color, it means it is still moving , otherwise, it is good to fix it...

now, you probably know how bore I am at work... answering question even I don't know the answer...

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Old 09-13-2006, 09:25 PM   #6
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sunken garage floor


Is the floor damaged in any other areas? Do you think rain drainage could be a problem? I would at least break out the "sunken" part. See if the soil underneith has compacted a little bit. Also check to see if the other part of the slab isn't undermined.

I don't know your situation, but I had a slab where a big tree had grown roots underneith, and sucked dry all the soil, which caused everything to compact, and broke the slab like you fold a piece of paper.
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Old 09-14-2006, 09:51 PM   #7
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There are companies that can raise your concrete slab by pumping more concrete under the existing slab. It's prettey cool to watch the process and pretty quick too.

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