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Old 01-22-2011, 10:19 AM   #1
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patio migrating away from house


Hello I have a 10' x 10' patio that is migrating away from my house on one corner. It has moved about 2" on that side which is pushing my patio roof posts away as well. It does not look like its sinking just moving away from the house. I live outside of Austin tx and the ground is not exactly stable. Can anyone give me some ideas to move this back toward the house. This patio is thick over 6".

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Old 01-22-2011, 10:28 AM   #2
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patio migrating away from house


What part of the country do you live in?

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Old 01-22-2011, 10:31 AM   #3
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patio migrating away from house


Your part of Texas has expansive soils I believe. In order to help out, you need to post some pictures, and a description of how the patio was constructed (depth of footings if any, reinforcing in the concrete if any, type of post, method of attachment of the post to the patio.
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Old 01-22-2011, 12:00 PM   #4
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patio migrating away from house


here are some pics.
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patio migrating away from house-patio-001.jpg   patio migrating away from house-patio-002.jpg  
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Old 01-22-2011, 12:00 PM   #5
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patio migrating away from house


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Old 01-22-2011, 12:23 PM   #6
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patio migrating away from house


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One more
Are there footings underneath the slab to hold up the roof? Who built the pat and roof?
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Old 01-22-2011, 12:59 PM   #7
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patio migrating away from house


I dont think there are any footing under the slab. The 4x4 posts just look like theyre cemented in like a fence post. This patio was here when we bought the house. The house was built in 94. This migrating started I guess about 3 years ago after I removed 4 texas sage bushes.
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Old 01-22-2011, 01:03 PM   #8
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patio migrating away from house


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I live outside of Austin tx and the ground is not exactly stable.
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What part of the country do you live in?
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Old 01-22-2011, 01:05 PM   #9
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patio migrating away from house


Can't tell from the pics,,,,
Does the grade slope away from the house where that slab sits?
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Old 01-22-2011, 01:06 PM   #10
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yes it does.
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Old 01-22-2011, 04:15 PM   #11
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patio migrating away from house


Has the region been wetter or drier the last few years? Such as drought or excessive rain like conditions.
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Old 01-22-2011, 04:56 PM   #12
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severe drought
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Old 01-22-2011, 04:57 PM   #13
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patio migrating away from house


Where the patio is separating from the house it looks like theres a hollow spot no soil.
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Old 01-22-2011, 11:42 PM   #14
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patio migrating away from house


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severe drought
Soil around the slab could be shrinking causing it to carry the concrete away from the house.
You might try taking the grey water the house produces and letting it soak into the soil at the end of the slab. As the soil expands, maybe it will push the slab back.
Ron

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