Can You Lift Cracked Concrete? A Complete Guide to Concrete Raising and Foundation Repair

More Than Just Cosmetics
A cracked concrete slab in your driveway, patio, or basement signals a bigger problem below. The visible crack is a symptom. The soil beneath is eroding, settling, or shifting, causing the concrete to drop.

The good news? You can lift cracked concrete. You might not be able to fully fix the crack with lifting alone, but you can raise the slab back to its original elevation, stop the settling progression, and restore functionality. The challenge is choosing the right method for your specific situation.
Most contractors get this wrong. They’ll talk about concrete replacement. Some’ll sell you an overlay. A few will actually investigate what’s causing the drop and address it. That’s where concrete lifting systems come in—and why the Rhino Foundation System has become the standard for precision concrete raising.
This guide will walk you through proven solutions, help you determine when they apply, and outline what you need to know before making a decision about concrete lifting.

Yes, proper encapsulation prevents mold, but only when installed correctly with supporting systems in place. A vapor barrier alone isn’t enough. A sealed crawlspace without dehumidification also fails. Real results come from understanding encapsulation as part of a full moisture management system—separating long-term solutions from temporary fixes

Part 1: Understanding Why Concrete Cracks and Settles

Before you can lift concrete effectively, you need to know why it’s cracking and settling in the first place. The crack you see is almost always secondary to the underlying problem.

The Two Types of Concrete Problems: Settling vs. Structural Failure

Settlement cracks occur when the soil beneath the concrete compresses, erodes (wears away due to water), or shifts (moves). The slab itself remains intact, but it sinks as the earth under it gives way. These cracks are typically:

Diagonal (45-degree angle)
Progressive (getting worse over time)
Accompanied by visible elevation differences at joints
Centered on the areas experiencing the most soil movement

Structural cracks occur when the concrete itself is failing. This happens less often with properly poured slabs, but can result from:

Concrete freeze-thaw deterioration
Rebar corrosion
Poor initial installation
Excessive loading
Chemical attack

The distinction matters because it determines your repair strategy. A settling concrete slab can be lifted. A structurally compromised slab might need partial replacement first.

Now that you know the types of concrete issues, let’s explore what causes the soil to settle beneath your slab.

Under a concrete slab, soil has been compressed by the slab’s weight. Over time, several processes create voids:

Water erosion: Plumbing leaks, poor drainage, or subsurface water movement wash away fine soil particles, creating hollow spaces underneath the slab.
Soil consolidation: The gradual compression of soil over 5-10 years under the slab’s weight. As deeper layers get more compacted (denser), voids (empty spaces) develop above them.
Frost heave and thaw cycles: In northern climates, seasonal freezing and thawing cause soil to expand and contract. When thaw happens, gaps remain.
Organic decomposition: In some regions, subsurface organic matter (roots, clay) decomposes, reducing soil density.
Vibration and traffic: Heavy vehicle traffic, equipment operation, or industrial activity can compact subsoil unevenly, creating low spots.

In Utah and similar western climates with seasonal moisture variation and frost cycles, settling is particularly common around basements, driveways, and patios. You’ll often see the problem appear first at the concrete-to-structure joint (where the slab meets your foundation wall), then progress outward.

The Crack Pattern Tells the Story

Diagonal cracks (45-degree angle): Typically settling. The slab is dropping more on one side than the other, creating diagonal stress. This is what you’ll see most often in residential concrete.

Longitudinal cracks (running along the length): Can indicate either settling (if centered) or structural stress (if near edges or under load points).

Spider-web or alligator cracks: These are a network of small, interconnected cracks resembling a spider web or the skin of an alligator. They usually signal structural failure or late-stage settling with severe uneven movement. Step cracks (stairstep pattern at concrete joints): Classic settling pattern. The slab is literally stepping down as you move across it.

If you see a crack and a visible height difference when you run your hand across the concrete, you’re definitely dealing with a settling slab. That’s when concrete lifting becomes viable.

Now that you understand why concrete settles and cracks, the next step is answering the main question: Can you actually lift cracked concrete? Direct answer: Yes, you can lift cracked concrete—with caveats.

You can raise a sunken slab back to its original elevation using modern concrete lifting systems. Whether lifting is the right solution depends on:

The underlying cause
The severity of the cracks
The soil conditions underneath
Your long-term goals

What lifting does:

Raises the slab back to proper elevation
Redistributes weight and pressure
Stops progressive settling
Restores safety (eliminates trip hazards)
Can partially close some cracks

What lifting doesn’t do:

Completely close existing cracks in the concrete itself (though it may reduce them)
Fix drainage issues that caused the settling in the first place.
Prevent future settling if the underlying problem isn’t addressed.
Repair structural damage to the concrete (spalling, deep breaks)

A concrete slab that’s settled 1-3 inches due to soil erosion or consolidation? Perfect candidate for lifting. A slab that’s structurally broken? You might need partial demolition and replacement first.

TPolyurethane foam systems like the Rhino Foundation System now deliver results that previously required complete concrete removal and replacement.Why Modern Systems Changed the Game

Traditional mudjacking (slurry injection) was effective but slow and heavy, and sometimes caused additional settling when the slurry weight exceeded the original concrete load. The process also created larger holes in the concrete and delayed its curing.

Polyurethane foam systems (like Rhino) changed the equation:

Precision: Foam injection is more controlled. The foam expands gradually, lifting the concrete evenly without sudden jerking or breaking.

Speed: Curing happens in 15-30 minutes. You can restore concrete to service within hours, not weeks.

Minimal impact: Smaller injection ports mean less visible patching and less structural disruption to the surrounding concrete.

Strength: The foam provides both lifting force and structural fill—it doesn’t settle over time like slurry. It’s inert and won’t degrade.

Void detection: Modern systems use pressure monitoring to identify voids and ensure complete fill.

This is why polyurethane approaches like the Rhino Foundation System are now the top choice for residential and light commercial concrete lifting—enabling precision previously impossible.

Part 3: Concrete Lifting Methods—What Actually Works

Not all concrete lifting approaches are equal. Here’s what works, when it works, and why.

Method 1: Polyurethane Foam Injection (Polyjacking)

How it works:

Technicians drill small holes (usually 5/8″ to 1″) through the concrete at calculated points. A specialized pump injects expanding polyurethane foam beneath the slab. The foam expands, gradually and precisely lifting the concrete. Curing happens in minutes. Holes are sealed with concrete.

Best for:

Residential and light commercial slabs
Driveways, patios, sidewalks
Basement floors with minimal utilities
When you want fast results with minimal disruption
When precision matters (near structures, pool decks, etc.)

Advantages:

Fast curing (15-30 minutes)
Precise control (pressure-monitored lifting)
Minimal concrete disturbance
Small injection ports (less visible patching)
Works in various soil conditions
Can be used indoors (minimal mess)
Long-term stability (foam doesn’t settle)

Limitations:

More expensive per square foot than mudjacking
Requires skilled technicians for proper pressure control
Doesn’t work well if utilities are directly under the slab
May not work if water is actively flowing under the slab
Can’t lift extremely heavy slabs (industrial applications)

Typical cost range: $6-15 per square foot (varies regionally and by slab condition)

Rhino Foundation System specifics:

The Rhino system uses proprietary polyurethane formulations that achieve specific density and expansion rates. Technicians monitor uplift pressure in real-time, preventing over-lifting (which can damage concrete) and under-lifting (which wastes material). The precision is why Rhino contractors can safely lift concrete adjacent to active structures without risk of new cracking.

Method 2: Mudjacking (Slab Jacking)

How it works: Holes are drilled into the concrete. A slurry—meaning a mixture of soil, cement, water, and additives—is pumped under the slab at high pressure. This slurry fills the voids under the slab and pushes it up under pressure. It takes 24-48 hours for the mixture to harden.

Best for:

Large commercial or industrial slabs
Agricultural concrete
Situations where cost is the primary concern
Slabs where utilities aren’t a constraint

Advantages:

Lower cost per square foot
Uses a heavier material that provides additional bearing capacity
Works for very large slabs
Time-tested method (decades of history)

Limitations:

Slower curing (24-48 hours)
Heavier slurry can cause additional settling in some cases.
Larger injection holes
Potential for uneven lifting
Slurry can sometimes escape if void locations aren’t precisely mapped.
Can damage utilities if they’re under the slab
Not ideal for precision work (near structures, pools, etc.)

Typical cost range: $3-8 per square foot

Why polyurethane has largely replaced it for residential work: While mudjacking is cheaper upfront, polyurethane foam offers greater precision and reliability, making it preferred where accuracy matters. For a 500 sq ft driveway, you might save $1,500–$3,000 with mudjacking, but risk uneven lifting, longer downtime, and future settling issues.

Method 3: Mechanical Underpinning

How it works:

This isn’t concrete lifting per se—it’s foundation repair. Steel piers or helical piles are driven (or screwed) into stable soil beneath the settling structure. The foundation is then lifted back to proper elevation using hydraulic jacks. The concrete is lifted as a result of the structure being re-leveled.

Best for:

Foundation wall settling (not just concrete slabs)
When the underlying soil conditions are extremely poor
Slabs that are settling as part of a broader foundation settlement
When you need to address the root cause, not just the symptom

Advantages:

Addresses the root cause directly
Can handle severe settlement (6+ inches)
Works on any soil type
Provides long-term stability guarantee
Doesn’t depend on concrete injection

Limitations:

Significantly more expensive
Requires excavation and structural work
Takes longer (days to weeks)
Overkill for simple settling slabs
Not necessary if settling is localized to the slab

Typical cost range: $15,000-50,000+ (for foundation, not just concrete slab)

When to consider instead of slab lifting:

If the concrete is settling because your foundation wall is settling, you’re addressing the symptom by lifting the slab. You should address the wall instead. That’s why a proper inspection is crucial.

Method 4: Concrete Replacement (When Lifting Isn’t Enough)

Sometimes lifting isn’t the answer.

When replacement makes sense:

Structurally damaged concrete (deep spalls, rebar exposure, and concrete breaking apart)
Extreme settlement requiring lifting >4 inches in one area
Slabs where utilities make injection impossible
When the cost of lifting approaches the cost of replacement
Slabs that are 30+ years old with multiple issues

Cost: $8-15 per square foot for removal and replacement (plus site restoration)

The calculus has shifted since polyurethane lifting became available. Tasks that required replacement 15 years ago can often be lifted today. A cracked, settled driveway that would’ve cost $5,000-8,000 to replace can now be lifted for $2,500-4,000.

But don’t automatically assume lifting is better. If the underlying cause is a failed drainage system or active water erosion, you need to fix the drainage first—or the concrete will settle again.

Part 4: The Rhino Foundation System—How It Works

The Rhino Foundation System represents the current state of the art in polyurethane concrete lifting technology. Understanding how it works illustrates why this approach has become the industry standard.

Core Technology: Expanding Polyurethane Foam

Rhino uses a two-component polyurethane formula:

Part A: Polyol resin
Part B: Isocyanate

When mixed at the nozzle, the components react and expand. The expansion rate and final density are calibrated based on:

Soil conditions
Expected void size
Desired lifting force
Concrete thickness and weight

The foam reaches strength within 15-30 minutes (vs. 24-48 hours for slurry-based systems). At full cure (typically 24 hours), the foam has structural integrity and won’t settle, compress, or degrade over time.

The Lifting Process: Step by Step

Inspection and mapping

A technician assesses the slab elevation (using laser levels), identifies void locations (with ground-penetrating radar in some cases, or pressure testing), and calculates the optimal injection points. Rhino contractors typically space injection points 3-4 feet apart in a grid pattern.

Drilling

Small-diameter holes (usually 5/8″ inch) are drilled through the concrete at calculated points. Drilling is controlled to avoid hitting utilities. On slabs with utility concerns, technicians may use radar or vacuum excavation to confirm utility locations first.

Pressure testing (optional but recommended)

Before injection begins, low-pressure air or water is applied to the void space. This confirms the location and size of the void. Pressure readings help technicians calibrate foam injection parameters.

Foam injection

The injection system is set up at each hole. Foam is injected at controlled pressure, typically 10-50 PSI. The technician monitors pressure in real-time. If pressure rises too quickly, it signals that the void is filling and indicates when to stop injection.

The magic here is precision. Over-pressure can break the concrete or create excessive lift. Under pressure, leaves voids unfilled. Skilled Rhino contractors achieve controlled lifts of 1-3 inches per injection point, with accuracy within 1/4 inch.

Real-time monitoring

Modern Rhino systems provide digital pressure readouts and, in some cases, video monitoring of uplift. The technician can see the slab rise in real time and adjust the pressure accordingly.

Secondary injections

If initial voids weren’t fully mapped, secondary injections can be made at nearby locations to achieve uniform lift.

Hole sealing

Once the foam has cured (15-30 minutes), holes are sealed with polyurethane or concrete repair compound. This is cosmetic—the holes are small, and the sealant matches the concrete color.

Slab walk-off

The concrete can be walked on within 1-2 hours. Full cure (maximum strength) takes 24 hours.

Why Pressure Control Matters

A poorly executed polyurethane lift can go wrong in specific ways:

Over-lifting: If pressure is applied too aggressively, the foam expands too quickly, lifting the concrete beyond its original elevation. This can:

Crack the concrete further (new cracks may appear)
Break the bond between slab sections.
Lift utilities with the slab.
Create safety hazards (suddenly raised concrete)

Under-lifting: If the injection stops too soon, the voids aren’t completely filled. The concrete may settle again over weeks or months as residual void spaces compress under weight.

Uneven lifting: If voids aren’t properly mapped and injections are made at irregular points, the slab can rise unevenly. This can create new problems—a slab that was settled on one side might now be higher on that side and lower on the other.

The Rhino system addresses these risks through:

Trained technicians: Certification and ongoing training for Rhino contractors
Pressure monitoring: Real-time feedback prevents over-lifting
Proper void mapping: Initial inspection identifies void locations
Conservative uplift targets: Professionals usually aim for 90% of original elevation, not 100%, to prevent over-correction

This is why hiring a properly trained Rhino contractor matters. Cheap foam lifting from untrained operators can create problems faster than it solves them.

Cost Structure and Variables

Polyurethane foam lifting costs vary based on:

Slab size and geometry: Larger slabs need more injection points. Irregular shapes with multiple sections cost more per square foot than simple rectangles.

Settlement severity: Slabs settled 1 inch cost less to lift than slabs settled 3 inches (more foam, more time, more material).

Soil conditions: Poor, compressible soil might require more foam or closer injection spacing. Stable soil requires less material.

Utility conflicts: If utilities run under the slab, inspection and avoidance protocols increase costs.

Accessibility: Slabs in tight spaces or with obstacles (parked cars, equipment) cost more due to the additional setup time required.

Regional factors: Labor rates vary significantly by region. Utah and the West typically run $8-12 per square foot. Some regions run $15-20.

Typical residential slab (500-800 sq ft): $3,500-8,000

Commercial slab (2,000+ sq ft): $12,000-25,000+

Quotes should be itemized by square footage, number of injection points, and materials used.

Part 5: Other Considerations—Why Cracked Concrete Needs More Than Just Lifting

Lifting the concrete is only part of the solution. You also need to address:

Crack Sealing

If you lift a concrete slab that has cracks, the lifting may close the crack partially—especially if the crack is purely settlement-related and the concrete itself isn’t fractured. However:

Structural cracks (where concrete is actually broken) often won’t fully close with lifting.
Cosmetic concerns remain even after lifting (the visual line is still visible)
Water intrusion can continue if the crack isn’t sealed.

After lifting, many contractors recommend sealing cracks with polyurethane or epoxy concrete sealant. This prevents water infiltration and future deterioration.

The Rhino system sometimes includes crack injection as part of the scope—foam is injected into cracks before slab lifting to fill the crack space. This combines sealing and lifting in a single operation.

Drainage Improvement

If settling occurred due to poor drainage or water erosion, lifting without fixing the drainage just delays the next problem.

After lifting, consider:

Correcting grading to slope water away from the foundation
Installing/repairing gutters and downspouts to move roof water away
Adding perimeter drainage around the foundation
Repairing irrigation leaks that may have eroded soil
Ensuring basement drainage is functioning (if the basement slab is the issue)

These improvements protect your investment in concrete lifting. Without them, you’re virtually guaranteeing that the slab will settle again in 5-10 years.

Monitoring and Maintenance

After concrete lifting:

First 2-4 weeks: Monitor the slab for any signs of re-settling. Some contractors offer a “check back” service, returning to verify that the concrete hasn’t dropped.

Ongoing: Watch for new cracks or signs of water pooling. Drainage issues often appear after lifting if they weren’t addressed.

Every 5-10 years: Inspect for signs of new settlement. Early detection of settling allows for smaller, cheaper lifts before the problem becomes severe.

Part 6: Concrete Lifting vs. Concrete Replacement—The Decision Matrix

This is where you need to think like a contractor, not just a homeowner looking for a quick fix.

Factor	Lifting (Polyurethane)	Replacement
Cost	$6-12 per sq ft	$10-20 per sq ft
Downtime	Hours to 1 day	3-7 days
Durability	15-20+ years (if underlying cause is fixed)	25-30+ years
Best for settled slabs	Yes, excellent	Only if severely damaged
Best for cracked slabs	Only if settlement is the cause	Yes, if structural damage exists
Precision	High	Lower (new concrete will settle to some degree)
Environmental impact	Lower (preserves existing concrete)	Higher (waste, new material)
Time to full use	1-2 days	7-14 days (concrete cure time)
Local aesthetics	Original color/texture preserved	New concrete may not match existing
Utility concerns	Can work around them	Requires relocation

Choose lifting if:

The slab is settled but not structurally damaged.
You want fast results.
Budget is a concern
The existing concrete is still sound.
You can address drainage issues.

Choose replacement if:

The concrete is spalling, breaking, or severely damaged.
Settlement is extreme (>4 inches), and lifting isn’t practical.
You want the longest possible lifespan.
The slab is very old, and multiple issues are present.
You’re willing to pay more for a new start.

Reality: Many contractors will recommend replacement because it’s simpler and more profitable. Lifting requires skill and expertise. A less experienced contractor might look at a settled driveway and recommend “just pour a new one.” Don’t accept that without a second opinion.

Part 7: Regional Considerations—Why Climate and Soil Matter

Your location affects both the likelihood of concrete settling and the best repair approach.

Northern Climates (Freeze-Thaw Regions)

Cause of settlement: Frost heave, followed by thaw, creates voids under slabs. Winter freezing expands soil; spring thaw leaves gaps.

Frequency: Common, especially in exposed areas (driveways, walkways).

Best approach: Polyurethane lifting works excellently in these regions because the voids are typically well-defined and the soil, once injected with foam, is stable.

Additional consideration: Ensure drainage is excellent in freeze-thaw zones. Ice dams and water pooling accelerate settling.

Western Climates (Expansive Soil Regions)

Cause of settlement: Many western regions (including Utah, Colorado, parts of California) have expansive clay soils that shrink when dry and expand when wet. Seasonal moisture variation creates movement.

Frequency: Extremely common around foundations.

Best approach: Polyurethane lifting, combined with moisture control and drainage correction. Expansive soil can cause settling, then expansion, then settling again—so addressing moisture is critical.

Additional consideration: Foundation waterproofing and subsurface moisture barriers are often necessary to prevent recurrence.

Humid Southeast/Coastal Regions

Cause of settlement: High water tables, organic soil decomposition, inadequate drainage.

Frequency: Common, especially in older construction with poor drainage.

Best approach: Polyurethane lifting combined with aggressive drainage improvement (gutters, grading, perimeter drainage).

Additional consideration: Mold and moisture issues often accompany settling slabs in these regions.

Arid Southwest

Cause of settlement: Soil desiccation (drying) causes consolidation. Roots of large trees dry out soil, creating voids. Sudden irrigation or plumbing leaks cause heaving.

Frequency: Common around trees and where sudden moisture changes occur.

Best approach: Polyurethane lifting, with attention to tree root management and irrigation control.

Additional consideration: Settling often appears suddenly when irrigation is installed or increased.

Part 8: The Complete Concrete Lifting Process—What to Expect

If you decide concrete lifting is the right solution, here’s what the actual process looks like.

Phase 1: Initial Inspection (1-2 Hours)

A licensed contractor visits your property. They assess:

Elevation differences: Using laser levels, they measure the slab’s drop. This determines how much lift is needed.
Crack patterns: Diagonal cracks indicate settling; other patterns indicate structural issues.
Surrounding structures: Are there structures nearby that could be affected by lifting? Garages, stoops, pavement transitions?
Utilities: Where are the electrical, plumbing, and gas lines located? Are any directly under the slab?
Soil conditions: If visible, what’s the soil type? (Clay, sand, rocky) This affects foam requirements.
Drainage: Is water pooling anywhere? Are gutters and grading functioning?

The inspection ends with a detailed proposal that includes:

Estimated square footage requiring lift
Expected elevation correction (target height)
Number of injection points
Estimated material cost
Labor cost
Timeline
Warranty (typically 10-15 years)
Conditions and limitations

What makes a good inspector:

Takes detailed measurements
Explains findings in terms you understand
Discusses root causes, not just symptoms
Recommends drainage improvements if needed
Provides references
Is clear about limitations (what can and can’t be lifted)

Phase 2: Preparation (1-2 Days Before Work)

Once you’ve approved the proposal:

Scheduling: The contractor schedules the work. Polyurethane lifting is weather-dependent (works best in 50-80°F). Winter work is possible in most regions, but it may take longer.
Pre-work instructions: You’re asked to clear the area (park cars elsewhere, remove patio furniture, etc.). Utilities are marked.
Final walkthrough: The contractor confirms access and reviews the scope one more time.

Phase 3: Execution Day

Timeline for a typical 500-800 sq ft slab: 4-8 hours

8:00 AM – Setup

The contractor arrives with equipment: the injection pump, foam supply canisters (Part A and Part B), pressure gauges, drilling equipment, and sealing material. A generator or air compressor may be needed. The work area is marked off.

8:30 AM – Drilling

Holes are drilled at predetermined points. This is the loudest part—about 30 minutes of drilling noise. Holes are small (5/8″), so cosmetics aren’t a major concern, but the drilling creates dust.

9:00 AM – Setup for injection

The injection system is positioned. Tubing connects the pump to the injection point. Initial pressure testing may occur (optional).

9:30 AM – Foam injection

Foam is injected at each hole. The technician controls pressure and monitors uplift. Each injection point takes 5-15 minutes, depending on void size and soil conditions. You may see the concrete physically rise. Some people find this satisfying; others, nerve-wracking.

Progress across the slab is systematic—usually in a grid pattern. Technicians work methodically to ensure even lift.

12:00 PM – Secondary injections (if needed)

If the initial assessment underestimated void sizes or locations, secondary injections may be needed. This is common and usually included in the scope.

12:30 PM – Hole sealing

Once the foam has cured (15-30 minutes), holes are sealed with concrete repair compound or polyurethane sealant. This is cosmetic—the goal is to make the holes as inconspicuous as possible.

1:00 PM – Final inspection and walk-off

The slab is remeasured to confirm that the proper elevation was achieved. The area is cleaned. You’re given final instructions on when the concrete can be fully used.

Total time on site: 5-6 hours

Larger slabs take proportionally longer. A 1,500 sq ft commercial parking lot might take 12-16 hours (often split across two days).

Phase 4: Post-Work Care (24-48 Hours)

Immediate (1-2 hours): The concrete is typically walkable. Avoid heavy traffic (cars) for the first 12-24 hours.
Curing period (24 hours): Full cure happens within 24 hours. You can resume normal use after this.

Follow-up visit (optional): Some contractors schedule a check-back visit 2-4 weeks after lifting to verify no re-settling has occurred.

Part 9: Costs, Warranties, and Red Flags

Concrete Lifting Cost Breakdown

Material costs (your actual cost):

Polyurethane foam: $1-2 per injection point
Sealant and patching: $0.50-1 per hole
Supplies and equipment: vary

For a 500 sq ft slab (roughly 40-50 injection points): $150-250 in materials

Labor costs:

Inspection: $150-300
Drilling and setup: $200-400
Injection and monitoring: $400-800 (depends on soil conditions)
Cleanup: $100-200

Total labor for 500 sq ft: $850-1,700

Equipment and overhead:

Truck, insurance, administration, training: Contractors add 20-40%

Total project cost for 500 sq ft slab: $2,000-4,000 (approximately $4-8 per sq ft)

Commercial slabs and larger projects typically have better unit economics (lower cost per sq ft) due to scale.

What a Warranty Should Include

A reputable Rhino contractor typically offers:

15-year warranty against re-settling (if performed correctly and the underlying cause is addressed)
Coverage for material failure (if foam fails to cure or perform)
Limited coverage for new cracks caused by lifting (excluding pre-existing cracks)
Exclusions: Damage from new water intrusion, additional settling if drainage isn’t addressed, damage from vehicle traffic exceeding the concrete’s rated load

Read warranty fine print. Some contractors offer shorter warranties (5-10 years) or offer warranties only if you also contract them for drainage improvements.

Red Flags When Getting Quotes

Warning sign #1: “Cheap” quotes that are significantly lower

If one contractor quotes $2 per sq ft and another quotes $6, ask why. It might be:

Different scope (fewer injection points—which means incomplete lifting)
Less skilled crew (leads to uneven lifting or over-lifting)
Lower quality materials
No warranty

Don’t automatically go for the lowest price. You’ll regret it when the slab starts settling again in 2 years.

Warning sign #2: Pressure-selling or “limited time” offers

Reputable contractors don’t need to pressure you. If a contractor is pushing hard and offering a discount if you “sign today,” be skeptical.

Warning sign #3: No discussion of root cause

If the contractor only talks about lifting and never mentions drainage or what caused the settling, they’re not thinking about your long-term problem.

Warning sign #4: Guarantees against new cracks

A contractor who promises that lifting will “completely fix” a cracked slab is overselling. Lifting may reduce or close some cracks, but it can’t guarantee closure of structural cracks.

Warning sign #5: Unclear scope or estimates

The quote should specify:

Square footage of the slab
Number of injection points
Expected elevation correction
Material costs are separated from labor
Warranty details

If the estimate is vague, ask for clarification before signing.

Part 10: Concrete Lifting + Drainage—The Right Approach

Here’s the conversation most contractors should have with you, but often don’t:

Contractor: “Your driveway has settled 1.5 inches. We can lift it back with polyurethane foam.”

What they should also say: “The settling happened because of soil erosion under the slab. Before we lift it, we should address why the erosion happened. Is there a plumbing leak? Poor drainage around the area? Water pooling during rain? If we don’t fix that, the slab will settle again in 5-10 years, and you’ll be back where you started.”

The right approach involves:

Identify the root cause: Plumbing leak? Poor grading? Eroded subsurface? Lack of gutters?
Fix the cause: Repair plumbing, regrade to slope away from the structure, install gutters, and ensure water is moving away from the slab.
Lift the slab: Once drainage is corrected, lift the concrete back to proper elevation.
Monitor: Watch for re-settling over the next 1-2 years as the repaired area stabilizes.

This is more expensive than lifting alone (perhaps 20-30% more), but it’s an investment in permanence rather than a temporary band-aid.

Many homeowners choose to skip the drainage work and just lift the concrete. That’s fine—you understand the risk. But if you’re paying thousands to fix this problem, it’s worth spending a bit more to fix it permanently.

Part 11: When to Call a Specialist (vs. DIY or Cheap Alternatives)

Some homeowners look at concrete lifting and think, “I could do this myself” or “I’ll call the cheapest contractor.”

Here’s why that’s risky:

DIY Polyurethane Lifting

You can buy polyurethane foam injection kits online for $100-$300. Don’t.

Why does this go wrong?

Lack of pressure monitoring: You can over-lift and crack the concrete or break utility lines
Improper void mapping: Without a professional assessment, you miss voids and get uneven lifting
Equipment issues: Consumer-grade equipment can’t match the precision of contractor-grade systems
Foam ratios: Professional foam is mixed and formulated differently from retail kits
Liability: If something breaks (underground utility, structure crack), you’re liable

A DIY lift might cost $300, but fixing the problems you create could cost $3,000-10,000.

Cheap/Unlicensed Contractors

Some one-person operations offer concrete lifting for $2-$3 per sq ft. They might:

Use lower-quality foam
Have minimal insurance or liability coverage
Lack of training in pressure control and void mapping
Operate without permits (which might matter if something goes wrong)
Be gone in 5 years if the work fails.

A cheap lift that goes wrong is exponentially more expensive than a professional lift that goes right.

When to Hire a Rhino-Certified Contractor

Rhino contractors have:

Brand-name backing and training
Proprietary foam formulations tested and proven
Insurance and bonding
Warranties are typically longer than those of independent contractors
Pressure monitoring and lift verification equipment
Continuing education requirements
Network of contractors (you can reference other Rhino jobs in your area)

For critical applications (near structures, valuable property, basements), a Rhino contractor is the prudent choice.

For simple, low-risk driveways, a highly rated independent contractor using quality polyurethane systems can work well.

Conclusion: Fixing Concrete Settling Doesn’t Have to Mean Replacement

The answer to “Can you lift cracked concrete?” is unequivocally yes.

Modern concrete lifting systems, particularly polyurethane foam methods such as the Rhino Foundation System, have fundamentally changed how contractors approach settled concrete. What previously required full replacement—at high cost and disruption—can now be lifted and restored in a day or two.

But lifting isn’t magic. It works when:

Settlement is the primary problem (not structural concrete failure)
Underlying causes are addressed (drainage, plumbing leaks, soil stabilization)
Qualified contractors perform the work properly.
Realistic expectations are set about crack closure and long-term results.

The cracked concrete in your driveway isn’t just a cosmetic problem. It’s a warning that something beneath the surface is wrong. Professional concrete lifting, combined with addressing root causes and proper maintenance, fixes the problem permanently rather than temporarily.

If you’re looking at a settled driveway, patio, or basement slab, get multiple quotes from qualified contractors. Ask about the Rhino Foundation System and other polyurethane options. Understand what caused the settling. And commit to fixing the drainage, not just the symptom.

Done right, you’ll have concrete that’s level, stable, and protected for another 15-20 years. That’s worth the investment.