We got a house where it has a one foot strip of concrete that is 20 feet long besides a patio that is in good condition.
On this 1'x20' strip there are two spots where the concrete has risen about an inch. This has produced two humps and a lip next to the patio near these parts. (sorry no picture but won't be over to the house for another month again)
I dug around these areas and both were caused by roots from a tree 15 feet away. I have broken these roots out and have a good 3 foot hole along the ridge. Is there anything I can do to sink these two "high" areas to "flat"? Really willing to try anything, as if we can't I will just make my ridge hole bigger and dump concrete in.
Best Answer
In your shoes, I'd do this:
Some notes:
Be sure to get the hose all the way to the far side of the concrete strip to accomplish a uniform descent and prevent tilting.
Stop when the slab is about 1/2" above the adjacent concrete. Chances are the slab will settle further as the soil fills the holes back in over time. Do occasional tamping over the next day or two and see where it stabilizes. Remove more soil if necessary, down to 1/8" or so above the adjacent slab.