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How to Repair a Sinking Concrete Slab

Repairing a cracked and sinking concrete pool patio and it's adjoining concrete slab walkway by injecting high-density foam under it
August 26, 2015

The cause of sinking or settling concrete slabs is the soil underneath rather than the slab itself. In this video, Erickson Foundation Supportworks uses the Poly Level System to fix a deeply cracked and settled slab.

The process involves marking sections on the surface, drilling holes through the slab, and inserting ports. A polymer substance is then sprayed into the holes, filling the void underneath the slab. The polymer foam expands and solidifies, lifting and stabilizing the concrete slab. After leveling the slab, surface cracks and portholes are sealed, and finishing touches are applied.

Repairing a sunken slab highlights

  • Sinking or settling concrete slabs are caused by the soil underneath, not the slab itself.
  • The poly level system is used to address this issue.
  • The process involves marking sections, drilling holes, and inserting ports.
  • A polymer substance is sprayed into the holes to fill the void underneath the slab.
  • The polymer foam expands and solidifies, lifting and stabilizing the slab.
  • After leveling, surface cracks and portholes are sealed, and finishing touches are applied.
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