Slab Foundation Settlement Repair

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Cracks in concrete floors often indicate slab foundation settlement problems. This issue is most commonly found in “slab-on-grade” homes and buildings. It’s when the floor slab is closer to the surface of the ground and therefore more affected by changes in the soil beneath.

The Cause

When changes occur in the moisture content and density of the soils beneath a concrete slab, the result is usually foundation settlement. An example of these changes would be the soils drying up due to extended drought-like conditions. Or it could be attributed to loosely compacted fill soils that consolidate beneath a slab. The most common causes are:
  • Soil that Dries and Shrinks
  • Erosion or Washout of Soil
  • Poorly Compacted Fill Soil
These causes among others will eventually create a void beneath the concrete slab. If the slab isn’t strong enough to span the void, it will eventually settle and break. The result is a cracked, sunken concrete slab. And once this occurs, you will most likely start to notice other signs of foundation damage throughout your home or building such as jammed doors or cracks in the walls and ceilings.
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Our Repair Methods

At Foundation Technology, our solutions close foundation cracks, eliminate trip hazards, restore property value, and most importantly, offer peace-of-mind knowing that your foundation problems have been permanently resolved. Instead of demolishing sunken slabs, our permanent, non-destructive concrete repair methods offer the ability to lift the damaged slab and interior partition walls back to their original level. This work can be completed in less than a day as it requires no trips to the landfill, and no need to wait for freshly poured concrete to cure. Our foundation repair products also include a written, 25 year transferable warranty!
  • The Slab Pier System
    Our slab pier system is one of the most cost-effective methods of repairing and restoring concrete slabs damaged by foundation settlement. Installation consists of driving interlocking tubular steel sections (piers), deep into the earth, bypassing problem soils, so that your floor can be supported by strong, competent strata or bedrock. The piers have an adjustable bracket at the top that connects to the underside of the slab. In addition to stabilizing, slab piers also provide an opportunity to lift your concrete slab back to its original position, often closing cracks and eliminating tripping hazards.

Polyurethane Foam Concrete Lifting

Our polyurethane foam concrete lifting system is recommended for damaged slabs that are extremely thin or when the cracking is extensive. This method combines the original concept of mudjacking with modern knowledge and technology. So instead of a mixture of concrete and mud, we utilize a high-density polyurethane to raise cracked, settled slabs. It starts with a chemical reaction that causes the foam to expand with powerful force, pushing settled concrete up toward its original, level position. It will also flow into loose soil, filling voids caused by the settlement. And is used to fill the voids beneath a concrete slab lifted by the pier system.
 

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