Structural Slab & Foundation Support

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     Structural slabs and foundations are subjected to continuous stress from soil movement, changing moisture conditions, heavy loads, vibration, and natural soil consolidation. When the ground beneath a structural slab weakens, voids form or soil loses bearing capacity, the slab begins to settle unevenly, crack, or fail under load. These issues often signal deeper subgrade problems that must be corrected to protect the building or structure above. Our Structural Slab & Foundation Support services restore stability by strengthening the soil, increasing load-bearing capacity, and reinforcing the slab through advanced deep injection techniques and engineered grouting solutions.

     Unlike standard slab lifting, structural support requires a deeper, more engineered approach. We focus on correcting the root cause of failure within the soil layers—not just the slab movement at the surface. Using deep injection polyurethane systems and geotechnical tools like Dynamic Cone Penetrometer (DCP) testing, we pinpoint weak or collapsible zones beneath the slab and inject high-density resin at targeted depths. As the material expands, it densifies the soil, fills voids, and increases bearing strength, creating a reinforced foundation layer capable of supporting heavy equipment, vehicles, racking systems, and structural walls.

     In addition to polyurethane deep injection, we also offer permeation grouting for specialized applications where soil types, high-moisture conditions, or structural requirements call for a different approach. Permeation grouting involves injecting low-viscosity material that penetrates fine soils—such as sands or silts—to create a hardened, uniform mass without soil displacement. This method is ideal for applications where maintaining soil structure is critical, where slab movement must be controlled with precision, or where external moisture conditions demand an alternative grout type. By offering both foam and permeation grouting, we can customize the repair to meet the specific engineering and soil conditions of each project.

     Structural slab settlement is common in warehouses, industrial facilities, commercial buildings, and municipal structures where heavy loads and constant vibration gradually weaken the subsurface. Residential properties also experience foundation-related slab settlement due to poor original compaction, expansive soils, groundwater movement, and erosion. By reinforcing the underlying soils, we stop movement at its source and restore structural performance.

     Our process begins with a detailed evaluation of the slab and subsurface conditions. If deep reinforcement is needed, we drill small injection points and deliver structural polyurethane or permeation grout to the required depths. Polyurethane resin compacts weak soil layers and increases density, while permeation grout solidifies fine soils that would otherwise be difficult to stabilize using foam alone. Both methods strengthen the subgrade without excavation and can be performed with minimal disruption to daily operations.

Structural slab and foundation support is ideal for:
• Warehouse and industrial floors experiencing differential settlement
• Commercial buildings with sinking interior slabs
• Heavy-load areas requiring deep soil densification
• Bridge approaches, loading docks, and municipal infrastructure
• Residential foundation slabs affected by soil collapse or erosion
• Projects requiring permeation grouting for fine soils or water-prone areas

     Polyurethane deep injection provides rapid curing, waterproof support, and long-lasting soil stabilization without adding weight. Permeation grouting offers alternative strength and penetration where foam is not the optimal solution. Together, these methods give us the versatility to approach each project with precision based on actual soil behavior and engineering requirements.

     In complex environments, we may combine deep injection, permeation grouting, void filling, and controlled lifting to create a comprehensive stabilization plan. DCP testing can be performed before and after the repair to verify compaction improvements and document soil performance for engineers and facility managers.

     Every project begins with an honest evaluation. If a slab or foundation requires reconstruction rather than reinforcement, we communicate that clearly. Our priority is delivering the most durable, safest, and most cost-effective repair strategy based on actual geotechnical conditions—not guesswork.

     Wisco Concrete Solutions provides structural slab and foundation support throughout Wisconsin and offers multi-state service for commercial, municipal, and industrial projects. Whether stabilizing a warehouse floor, correcting settlement in a commercial building, reinforcing soil beneath a heavy-load zone, or restoring stability in a residential structure, our engineered injection and grouting solutions deliver lasting results where they matter most.

     Settlement occurs when the soil beneath the slab loses strength due to poor compaction, moisture changes, erosion, organic soil breakdown, vibration, or long-term load stress. When the soil can no longer support the weight above it, the slab or foundation begins to sink or crack.

     Deep injection uses high-density polyurethane resin injected into specific soil layers. The material expands, compresses weak zones, fills voids, and increases load-bearing capacity. This stabilizes the slab from below and stops additional movement.

     Permeation grouting is ideal for sandy, fine, or water-saturated soils where traditional foam may not penetrate effectively. The low-viscosity grout flows into tight soil structures, solidifying them into a strong, uniform mass without displacing the surrounding ground. Certain projects we may use a variety of methods to get the results you need.

     Yes. Most industrial, commercial, and municipal projects remain operational during repairs. Both deep injection foam and permeation grouting cure quickly, allowing facilities to continue using the area with little to no disruption.

     It can do either — or both. Some projects require only soil densification and stabilization. Others may require controlled lifting to restore elevation. We evaluate the structural requirements before determining the best approach.

     We use tools such as Dynamic Cone Penetrometer (DCP) testing to measure soil strength at different depths. This data identifies weak or collapsing layers so our injections are placed exactly where reinforcement is needed.

     Yes. Structural-grade polyurethane foam delivers exceptional compressive strength and is used beneath warehouses, industrial slabs, transportation infrastructure, and areas with heavy equipment or dynamic loads.

     Yes. By reinforcing the soil and stopping movement at the source, stabilization prevents additional cracking and slows or stops structural distortion. Existing cracks can be repaired more reliably once the soil is secure.

     Both polyurethane foam and permeation grouting create long-lasting reinforcement. The materials do not shrink, wash out, or break down, and the improved soil density remains stable for decades under normal load conditions.

     Yes. While Wisconsin is our primary service area, we do travel to other states for commercial, industrial, and municipal stabilization projects that require advanced geotechnical repair methods.