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Gap bet theween concrete and soil

965 Views 3 Replies 3 Participants Last post by  garrett1812
After digging next to my concrete patio, to see the extent of a rodent den, I discovered (besides that the rodent den was not too large) that there is about a 1" +/- gap between the bottom of the concrete and the top of the soil.

From the hole I dug I could insert a tape measure about 6ft deep under the patio. I do not know if it is localized here, or if this condition exists all around the patio.

Any idea what caused this? Erosion? Poor compact of soil before pouring?

And more importantly, what needs to be done to fix it?

Normally the patio is just used for a dining table and chairs, but I have been eyeing a stone grill kit from Menards, which is approx 4000lbs in stone. I do not want to get this and make it crack. The patio is approx 1.5-2 years old.

Thanks for the help!


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The house is about 1.5 years old. I believe the patio was pored some months after the foundation, not at the same time. The patio sits directly up against the foundation.

Settling would make sense as the cause. I am going to have the builder look at it, hopefully they cover it! Sounds like an expensive fix otherwise.
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