Poly lift foundation repair and structural remediation services address uneven or sinking concrete slabs by injecting a high‑density polyurethane foam that expands to fill voids, lift the slab, and stabilize the structure. This method is faster, cleaner, and often more cost‑effective than traditional mudjacking, making it a reliable choice for residential and commercial properties experiencing settlement, cracks, or water‑induced damage.
- What Is Poly Lift Foundation Repair?
- When to Consider Structural Remediation
- Step‑by‑Step Process
- 1. Assessment and Soil Testing
- 2. Preparation
- 3. Foam Injection
- 4. Curing and Finishing
- Cost Overview
- Benefits Compared to Traditional Mudjacking
- Potential Limitations
- Choosing a Qualified Provider
- Maintenance Tips After Repair
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What Is Poly Lift Foundation Repair?
Poly lift (also called polyurethane slab lifting) uses a two‑component foam that expands up to 30 times its liquid volume. Technicians drill small holes in the concrete, inject the foam, and allow it to cure, creating a stable, level base without the heavy mess of cement slurry.
When to Consider Structural Remediation
Structural remediation is warranted when:
- Concrete floors show visible dips, cracks, or unevenness.
- Doors and windows stick due to floor movement.
- Water infiltration has eroded soil beneath the slab.
- Previous repairs have failed or are causing further settlement.
Early intervention prevents more extensive foundation damage and costly rebuilds.
Step‑by‑Step Process
1. Assessment and Soil Testing
A certified technician evaluates the slab, measures the degree of settlement, and conducts soil moisture tests to identify voids or soft spots.
2. Preparation
Cleaning the area, marking drill locations (typically 4‑6 inches apart), and protecting surrounding surfaces.
3. Foam Injection
Using a calibrated pump, the polyurethane components are mixed and injected. The foam expands instantly, filling voids and lifting the slab to the desired level.
4. Curing and Finishing
After 15‑30 minutes, the foam hardens. Holes are patched with a quick‑dry filler, and the surface is re‑leveled if needed.
Cost Overview
Pricing varies by region, slab size, and severity of settlement. The table below summarizes typical cost ranges based on industry surveys and contractor quotes (2023‑2024 data).
| Metric | Estimate or Range | Context |
|---|---|---|
| Average cost per square foot | $6‑$12 | Includes material, labor, and cleanup |
| Typical residential job | $1,200‑$3,500 | 10‑300 sq ft slab, moderate lift |
| Commercial lift (large area) | $5,000‑$15,000 | 300‑1,200 sq ft, multiple lifts |
| Additional repairs (crack filling) | $150‑$500 | Per crack, depending on width |
Benefits Compared to Traditional Mudjacking
- Weight: Polyurethane weighs ~2 lb/ft³ vs. cement slurry ~12 lb/ft³, reducing load on soils.
- Speed: Completion in 2‑4 hours vs. 1‑2 days for mudjacking.
- Precision: Lift accuracy within ¼ inch; mudjacking often requires multiple passes.
- Durability: Foam resists water absorption and freeze‑thaw cycles.
Potential Limitations
While poly lift is versatile, it may not be suitable when:
- Extensive structural damage exists (e.g., cracked footings).
- Soil is highly expansive clay that continues to shift.
- Local building codes require specific remedial methods.
In such cases, a full foundation underpinning or pier system may be recommended.
Choosing a Qualified Provider
Look for contractors who:
- Hold certifications from poly‑lift manufacturers.
- Provide a written inspection report and lift plan.
- Carry liability insurance and worker's compensation.
- Offer a warranty (typically 5‑10 years) on lift performance.
Request references and verify past projects similar to yours.
Maintenance Tips After Repair
To prolong the effectiveness of a poly lift:
- Maintain proper drainage away from the slab.
- Monitor for new cracks or moisture intrusion.
- Avoid heavy loads directly on previously lifted areas for at least 30 days.
Regular inspections every 2‑3 years help catch early signs of settlement.