This Raised Patio in Dexter, MI had been disturbed years prior by a contractor replacing the weep tile around the basement walls. The contractor back filled with fill sand, and did not replace the gravel base materials required for a successful paver installation. It is not likely the sand was properly compacted either. This resulted in the patio settling where the soil had been disturbed. Also, the entire patio had trapped water due to the resulting negative grade and had suffered frost heave/movement.
All the pavers inside the Raised Patio Retaining walls were lifted up and set aside for re-installation. The Retaining walls near the house were also lifted and set at the proper level to prevent water from becoming trapped.
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