Had to come back 2 times to get concrete leveling to stabilize.Unusual circumstances caused dirt under the concrete to settle a couple of times.DryZone never questioned returning and stood by their guarantee to get the job done.
The additional pressure needed caused several blowbacks that caused foam to get on some of porch and in concrete. They need to research a chemical that will remove the blowback.
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We had a bad experience with a previous company that we hired to do a CleanSpace system for us...