Prime Resins News
Voids and Sunken Slabs Fixed for Homeowners Pool Deck
Wash-out created voids and sunken slabs in the backyard of a South Carolina homeowner. Learn why using Precision Lift was the perfect solution.
A homeowner just outside of Charleston, South Carolina had plans to revitalize their backyard by building a pergola and cooking area. While cleaning up the yard, they noticed wash-out that was occurring under the concrete slabs that are flush with the house.
A year earlier, road construction in front of the house saw dirt piles near the street wash away during a typical, coastal torrential rain. This washed a tunnel out underneath the back patio which caused large voids and caused settlement of the slab.
Approximately 80% of the slab that was against the house was still in place with the void under it. The pool deck area had sunken four inches in a short distance. Concrete Corrections used their Precision Jacks (a compact, ergonomic two-piece jack system designed to work in unison with Prime Resin’s line of Precision Lift Lifting Foams) to lift the fallen slab. This was needed to create equal voids because the area where the slab broke had become pinched against the house foundation. Otherwise, when injecting, it would pick up the broken edge instead of making the pinched area release. Workers could then inject along the back side of the house to fill voids while monitoring until the slab moved slightly.
The homeowner described their scenario as ‘having a river under their slab’. After injecting the voids and lifting the slabs back to level, the contractor relocated the gutter drains to further avoid any washout scenarios. As of a few months post-completion, there are still no issues of water under the slabs.
“Precision Lift was chosen because of the speed of the product” said Richard Farist, owner of Concrete Corrections. “The quick set time allows us more control over where the product goes, which is especially important with a small slab”. Addressing these issues quickly upon discovery was vital for the long-term health of the home. Washing out soil next to the foundation, within a few years, could cause erosion issues to the point that the house could begin to fall.
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