Sunken Slabs. Cracked Driveways. Uneven Walkways. Foundation Consultation LLC Lifts, Levels, and Restores Concrete the Smart Way.

Not every concrete slab can or should be saved. When a slab has deteriorated beyond the point where lift, level, and crack repair can produce a durable, safe, and cost-effective result — when the concrete is severely spalled, when freeze-thaw damage has compromised the structural integrity of the slab itself, when extensive cracking has fragmented the slab into sections that cannot be stabilized, or when the sub-grade conditions require complete correction that cannot be accomplished from beneath — the right answer is removal and replacement.

Foundation Consultation LLC performs complete concrete removal and replacement for driveways, walkways, sidewalks, and patios — delivering new concrete that is properly designed, properly reinforced, and properly installed over a prepared sub-grade that gives it the long-term support it needs to perform without the settlement and cracking issues that plagued the original slab.

Concrete is one of the most durable building materials on the planet — but it is not immune to the forces working against it beneath the surface. The soil that concrete slabs rest on shifts, settles, erodes, and washes away over time — and when that support disappears, the concrete above sinks, tilts, separates at joints, and cracks under its own weight and the loads placed on it. In the Kansas City area, expansive clay soils that swell and shrink dramatically with moisture changes are a primary driver of concrete slab movement — pushing slabs up in wet seasons, pulling away from beneath them during dry periods, and creating the uneven, settled, cracked concrete surfaces that devalue properties, create liability hazards, and get worse with every season that passes.

Foundation Consultation LLC evaluates every concrete repair situation individually — assessing the condition of the slab, the stability of the soil beneath, and the most cost-effective and durable repair path for your specific situation. Not every slab needs replacement. And not every slab can be saved. Our job is to tell you honestly which category yours falls into and deliver the right solution — not the most expensive one.

The traditional solution for sunken concrete slabs was mudjacking — pumping a heavy slurry of cement, soil, and water beneath the slab through large drilled holes to float it back to level. Mudjacking works, but it adds significant weight to an already compromised soil structure, requires large and messy hole drilling, and uses a material that itself can wash away over time.

Unlike mudjacking slurry, polyurethane foam is lightweight — adding virtually no additional load to the soil that already failed to support the original slab weight. It is hydrophobic — it does not absorb water, does not wash away, and does not deteriorate in wet soil conditions. It fills voids completely and bonds to the underside of the slab, creating a stable, continuous support layer that prevents the re-settlement that is common when mudjacking material washes out or compresses under load over time.

Polyurethane foam lift and level is ideal for:

Sunken driveway slabs and aprons
Settled sidewalk and walkway panels
Uneven patio slabs creating trip hazards
Settled garage floor slabs
Pool deck panels that have shifted or sunk
Any concrete surface where individual panels have dropped relative to adjacent sections
The result is a flat, level, safe concrete surface restored to its original position — at a fraction of the cost of full slab removal and replacement, with minimal disruption to your landscaping, and with zero concrete downtime waiting for new material to cure.

Foundation Consultation LLC uses polyurethane foam injection — the modern evolution of slab lifting that is faster, stronger, lighter, and less invasive than mudjacking in virtually every application. High-density polyurethane foam is injected beneath the sunken slab through small — dime-sized — drilled ports that are barely visible once patched. The foam expands rapidly on injection, filling voids beneath the slab, compacting loose or washed-out soil, and generating the lifting force needed to raise the slab back to its original position with precision that mudjacking simply cannot match. The foam cures within minutes — not days — meaning the repaired surface is ready for foot traffic within an hour and vehicle traffic within a few hours of completion.

Control joints — the intentional saw-cut or tooled lines you see running across driveways, sidewalks, and patios — are engineered into concrete to control where cracks occur as the slab expands and contracts with temperature changes. When control joints are functioning correctly, they channel crack development into the joint itself rather than across the face of the slab. When control joints fail — when they erode, spall, chip, or when the joint sealant that fills them deteriorates and allows water infiltration — they stop doing their job and the slab begins cracking in uncontrolled locations.

Water infiltration through failed control joints is one of the primary mechanisms of sub-slab soil erosion and void formation in the Kansas City area. Every rain event drives water through open, unsealed control joints and into the soil beneath the slab — washing away fine particles, creating voids, and accelerating the settlement that leads to uneven, sunken concrete. Repairing control joints is not just a cosmetic improvement — it is a critical step in preventing future sub-slab erosion and the settlement that follows.

Foundation Consultation LLC repairs deteriorated and failed control joints by routing out all deteriorated material to a clean, uniform depth, preparing the joint faces for proper adhesion, and filling the joint with professional-grade polyurethane joint sealant that bonds to both sides of the joint, flexes with normal thermal expansion and contraction without cracking, and creates a waterproof seal that prevents water from infiltrating beneath the slab. Properly sealed control joints direct expansion and contraction forces exactly where they belong — into the joint — while keeping water out of the soil below where it causes the most long-term damage.

Surface cracks in concrete slabs are more than cosmetic — they are pathways for water to reach the soil beneath, accelerate freeze-thaw damage through the slab body, and grow wider and longer with every seasonal cycle that passes. A hairline crack left unsealed becomes a quarter-inch crack. A quarter-inch crack becomes a half-inch crack. And once water has been infiltrating beneath the slab through that crack for multiple seasons, the voids and erosion beneath it accelerate the slab's descent toward settlement and failure.

Foundation Consultation LLC repairs surface cracks in driveways, walkways, sidewalks, and patios using crack routing and professional-grade polyurethane sealant injection — the same waterproof, flexible sealant technology used in our control joint repair process. Cracks are routed to a uniform width and depth to create a clean bonding surface, blown out and dried, and filled with sealant that bonds permanently to both crack faces, flexes with thermal movement without re-cracking, and seals the crack completely against water infiltration and freeze-thaw damage. For structural cracks with vertical displacement between panels — where one side of the crack has risen or sunk relative to the other — polyfoam lift and level is used to restore the panels to the same elevation before crack sealing is performed.