Sinking Driveways Lifted Back to Grade With Polyurethane Foam Injection

A sinking driveway is moderate severity in most cases and structural in some. The immediate concerns are tripping hazards at any offset over 1/4 inch, water drainage reversing back toward the house foundation, and the void below the slab continuing to grow until the slab breaks. The structural concern shows up when the same water that voided the driveway subgrade is also reaching the house foundation. Some of the sinking-driveway calls Epp Foundation Repair inspects across its four-state service area have an accompanying foundation settlement issue we need to address first. Free on-site inspection tells you which category yours is.

The pricing covers the lift, the foam, the drill-port patching, the crack sealing, and the 30-day verification visit. Customized Repair Estimate after on-site inspection reflects your scope.

Yes, when the driveway is past the point where lifting makes sense. That is typically when the slab is broken into pieces smaller than 3 by 3 feet, or when surface deterioration is severe. Epp Foundation Repair diagnoses, lifts, and seals existing concrete driveways first, since that is usually the cheaper and faster fix. For sections that are finished, Epp removes the old concrete, corrects the ground that caused the failure, and pours new on properly prepared base. Installed flatwork carries a 1 year flatwork warranty against material defects and workmanship errors that cause the flatwork to fail to perform as intended under normal use. A small share of the driveways we inspect fall into the replacement category.

Because lifting a driveway over an active water source guarantees the settlement returns. Polyurethane foam fills the current void, but the same downspout that washed out the original subgrade will wash out the soil around the foam within 12 to 24 months. Epp Foundation Repair's warranty depends on the water source being addressed. We tell every homeowner this on the first visit and put it in writing on the estimate. Some homeowners need to do that downspout work or sprinkler repair before we will schedule the lift.

No. Epp Foundation Repair does not extend downspouts, regrade lawns, or repair sprinkler lines. Those are separate trades and we refer you to landscapers, gutter contractors, or plumbers. What we do is identify exactly what needs to be fixed and where, in writing, on the estimate. Either way, the work comes first, and the lift comes after.

When the water source is fixed and the lift is done correctly, Epp Foundation Repair warranties the lift against re-settlement. Polyurethane foam itself does not deteriorate. It is the same material used in marine flotation and roadway voiding repair by state DOTs. Real-world performance across the four-state region: lifts done in the mid-2000s are still holding 20-plus years later when the homeowner kept water away from the slab. The single biggest predictor of lift longevity is whether the homeowner fixed the downspout.