Jun 20, 2010 · Joined Sep 13, 2003. ·. 9,589 Posts. #13 · Jun 19, 2010. MariaAZ said: We have a 6'x9' concrete patio that needs to be lowered about 1/2". I had someone come out and give an estimate on removing and replacing it; 1600! I then called a tool rental place and asked for suggestions and they said to try a grinder.
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