Do you also have a monstrous gap between your sidewalk and front porch slabs? This occurs when your sidewalk sinks from soil shrinkage. Then, when there is a gap that forms, rain can then enter that gap and wash away all the soil from under the front porch. We stopped this process from occurring again by raising the slabs by injecting our industrial grade PolyLevel foam, which is a very clean process compared to mudjacking.
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