Small section of carport sunk

Old 06-19-18, 06:38 AM
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Small section of carport sunk

What is it called when they inject foam or some thing under slab to raise it? Corner of slab has sunk about 2 to 3 inches. Has been like this for many years and would like to fix. Who do you call for estimates?
Old 06-19-18, 09:20 AM
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I call it hydro jacking and there is a company named Ram Jack that does it.

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