Mudjacking vs Polyjacking vs PolyLevel: Concrete Leveling Compared (2026)

Sunken driveways, settled garage slabs, and tilted sidewalks aren’t always foundation problems — they’re concrete leveling problems, and three competing methods handle them. Mudjacking has been around since the 1930s. Polyjacking (polyurethane foam) showed up in the 1980s and has steadily taken share. PolyLevel — a branded premium foam product — is the version Basement Systems / Foundation Supportworks contractors push hard, often at 2-3× the price of generic polyjacking.

Each method physically lifts the slab, but they work very differently, cost very differently, and last very differently. The right choice depends on three things: what’s under your slab (soil type), how much weight will sit on top, and how long you want the fix to last.

TL;DR — Quick verdict

• Best value for residential driveways + sidewalks: Polyjacking (polyurethane foam) at $8–$25/sqft — better lifespan than mudjacking, faster cure, much less invasive
• Best for budget-only fixes: Mudjacking at $5–$15/sqft — half the price upfront but expect to redo it in 5–10 years
• Best for premium / transferable warranty: PolyLevel at $15–$30/sqft — branded NCFI polyurethane system; warranty transfers if you sell the home
• Skip leveling entirely if: the slab is cracked beyond repair (>50% of surface), has heaved (not settled), or sits on actively eroding soil — replacement or pier underpinning is the right call

Head-to-Head: Method Comparison

Factor	Mudjacking	Polyjacking	PolyLevel
Material injected	Cement-sand-clay slurry	Polyurethane foam (2-part)	Branded NCFI polyurethane (proprietary blend)
Material weight	~100 lbs/cu ft	~4 lbs/cu ft	~4 lbs/cu ft
Hole size in slab	1.5”–2” diameter	5/8” diameter	5/8” diameter
Cure time	24–48 hours	15 minutes	15 minutes
Lifespan	5–10 years	30+ years	30+ years (often 75-yr warranty)
Cost per sqft	$5–$15	$8–$25	$15–$30
Typical project (400 sqft driveway)	$2,000–$6,000	$3,200–$10,000	$6,000–$12,000
Soil re-settlement risk	High (heavy slurry can re-stress weak soil)	Low (lightweight foam)	Low
Water resistance	None (slurry erodes over time)	Excellent (closed-cell foam)	Excellent
Warranty length	1–3 years typical	5–10 years typical	25–75 years, transferable
Best for	Light loads, budget, temporary	Most residential applications	Premium installs, homes to be sold

How Mudjacking Works

Mudjacking is the original concrete leveling method, in use since the 1930s. The process:

1. Drill 1.5”–2” holes through the settled slab at strategic points (typically 4–8 holes for a residential driveway).
2. Mix a slurry of Portland cement, sand, and water (sometimes with clay or fly ash added).
3. Pump the slurry under the slab through the holes using a high-pressure pump. The pressure both fills voids beneath the slab AND lifts the slab back to level.
4. Patch the drilled holes with concrete after the lift is complete.
5. Cure for 24–48 hours before allowing vehicle traffic.

The lift mechanism is straightforward — fluid hydraulic pressure displaces soil voids and physically pushes the slab up. The slurry hardens into a stone-like fill that supports the slab afterward.

Where mudjacking falls short:

• Weight problem: the slurry weighs ~100 lbs/cu ft. On weak or saturated soils, the added weight can cause re-settlement within 5–10 years. The slab levels initially but sinks again as the slurry compresses the underlying soil.
• Water erosion: the cement-clay slurry isn’t fully waterproof. Groundwater or surface infiltration washes out fines over time, creating new voids that cause re-settlement.
• Larger holes: the 1.5”–2” patches are visible on the slab surface even after concrete patching. Bad cosmetics for visible driveways or walkways.
• Longer cure: 24–48 hours of no traffic on the slab. For a driveway you use daily, that’s a meaningful inconvenience.

Best use case: non-critical slabs (garden paths, secondary patios, garage slabs you’re planning to replace eventually) where budget dominates and 5–10 year lifespan is acceptable. Also reasonable for slabs sitting on engineered fill or stable bedrock where re-settlement isn’t a real risk.

How Polyjacking (Polyurethane Foam) Works

Polyjacking uses a two-part polyurethane foam injected through small holes:

1. Drill 5/8” holes through the slab (much smaller than mudjacking).
2. Inject the two-part polyurethane via a low-pressure pump.
3. The chemicals react and expand to 20–30× their liquid volume within 15 seconds, generating uniform lift pressure under the slab.
4. Foam cures hard in ~15 minutes.
5. Patch the small drill holes with a color-matched epoxy.

The expansion mechanism is fundamentally different from mudjacking. Instead of fluid hydraulic pressure, the foam expands uniformly in all directions, filling every void it encounters with consistent pressure. This creates an extremely even lift with minimal risk of overstressing weak spots.

Polyjacking’s structural advantages:

• Lightweight: at 4 lbs/cu ft, the foam adds essentially no weight to the underlying soil. Eliminates the re-settlement risk that haunts mudjacking on weak soils.
• Waterproof: closed-cell polyurethane doesn’t absorb water and doesn’t erode. The fill stays in place essentially indefinitely.
• Fast return to service: 15-minute cure means you can drive on the slab within an hour, not 48 hours.
• Less invasive: 5/8” holes are barely visible after epoxy patch (vs the obvious 2” patches mudjacking leaves).
• Precision lift: the contractor can lift the slab in 1/16” increments, leveling it precisely rather than the rougher control of mudjacking.

Where polyjacking falls short:

• Higher cost: 30–60% more per square foot than mudjacking.
• Not for extreme voids: if the void under the slab is enormous (5+ feet deep), foam alone may be inefficient. Mudjacking is sometimes a better fit for very large voids, OR a hybrid approach is used (mudjack the bulk void, polyjack the final lift).
• Quality variation: “polyjacking” is a category; different contractors use different foam brands with very different performance. Generic single-component foams compress under load; premium two-part polyurethanes (HMI, Alchemy-Spetec, NCFI/PolyLevel) don’t.

Best use case: the default modern choice for residential driveways, garage slabs, sidewalks, patios, and basement floor lifting. For 80% of jobs, polyjacking is the right answer.

How PolyLevel Differs from Generic Polyjacking

PolyLevel is the branded polyurethane system made by NCFI (a polyurethane chemicals manufacturer) and exclusively distributed through Basement Systems / Foundation Supportworks contractor network.

What PolyLevel adds over generic polyjacking:

• Higher-density foam: NCFI PolyLevel cures at 4-6 lbs/cu ft (vs 2-3 lbs for cheaper polyurethanes). Higher density = higher compressive strength = more load-bearing capacity.
• Transferable warranty: the warranty (typically 25 years; commercial-grade jobs sometimes 75) transfers to the home’s next owner. This matters if you sell the home — a documented PolyLevel install is a positive feature in inspection reports.
• Standardized install procedure: Basement Systems / Foundation Supportworks contractors are factory-trained on the system. Less install-quality variance vs generic contractors using random polyurethanes.
• Documentation package: you get a full report (foam volume, lift measurement, before/after photos) suitable for resale disclosures or insurance documentation.

What PolyLevel costs vs generic polyjacking:

The premium is 50–100% over generic polyjacking. Worth it when:

• You’re planning to sell the home within 5 years (transferable warranty has real resale value)
• The slab is structurally important (basement floor, primary garage, foundation-adjacent)
• The cost difference is small in absolute dollars (a $300 driveway lift becomes $500; not worth bothering)
• You want documentation for insurance or future structural concerns

Not worth the premium when:

• Slab is cosmetic only (garden path, secondary patio)
• You’re not planning to sell soon
• Generic polyjacking from a reputable local contractor is meaningfully cheaper

Cost Comparison by Project Type (2026)

Project type	Mudjacking	Polyjacking	PolyLevel
Single sidewalk slab (4’×4’)	$250–$500	$400–$700	$600–$1,000
Garage floor section (10’×20’)	$1,200–$3,000	$2,000–$5,000	$3,500–$6,500
Standard residential driveway (20’×20’)	$2,000–$6,000	$3,200–$10,000	$6,000–$12,000
Large driveway + walkway (800 sqft)	$4,000–$12,000	$6,400–$20,000	$12,000–$24,000
Basement floor lift (800 sqft)	$4,000–$12,000	$6,400–$20,000	$12,000–$24,000
Pool deck (1,000 sqft)	$5,000–$15,000	$8,000–$25,000	$15,000–$30,000

The per-sqft rates assume “average” lift conditions — slab sunken 1–2 inches, normal access, no major obstacles. For lifts greater than 4 inches OR for slabs with severe cracking that need stabilization before lifting, expect 30–60% premium across all methods.

Soil Suitability — When Each Method Wins

Clay soils (Texas Hill Country, parts of OK, KS, NE, IA):

• Mudjacking: marginal — clay expands and contracts seasonally, so any heavy fill can re-stress the soil
• Polyjacking: strong fit — lightweight foam doesn’t add to seasonal soil-stress problems
• PolyLevel: strong fit (same reasoning as polyjacking)

Sandy soils (Florida, coastal South, parts of CA Central Valley):

• Mudjacking: poor — slurry washes out faster in sandy soils
• Polyjacking: strong fit — foam doesn’t erode; waterproof
• PolyLevel: strong fit

Loamy/well-graded soils (most of US Midwest):

• Mudjacking: acceptable for budget jobs with 5-10 year horizon
• Polyjacking: strong fit (default residential choice)
• PolyLevel: strong fit (premium choice)

Rocky / shallow-bedrock soils (mountainous West, parts of Appalachians):

• Mudjacking: difficult — hard to drill clean injection holes through rocky fill
• Polyjacking: strong fit — small holes drill cleanly; foam fills uneven void shapes
• PolyLevel: strong fit

Engineered fill (newer construction over compacted fill):

• All three methods work — pick by cost / lifespan trade-off

Where NONE of the three methods work:

• Slab on actively expanding clay where heave (not settlement) is the actual problem — see our foundation heave repair cost guide instead
• Slab cracked beyond 50% — replacement is the right answer
• Foundation issues affecting the home itself (not just the slab) — methods like carbon fiber or helical piers address structural foundation problems

Lifespan and Warranty — The 30-Year View

For a $5,000 lift, the total-cost-over-30-years math matters:

Method	Year 0	Year 10	Year 20	Year 30	30-yr total
Mudjacking	$5,000	$5,500 (redo)	$6,000 (redo)	$6,500 (redo)	$23,000
Polyjacking	$7,500	$0	$0	$0 (or $7,500 redo)	$7,500–$15,000
PolyLevel	$10,000	$0	$0	$0 (warranty still active)	$10,000

Mudjacking’s apparent upfront savings ($5K vs $7.5K) reverse over 30 years — you typically pay 3× the polyjacking total because you’re paying for redos every decade. For slabs you’ll own long-term, polyjacking is the cheaper actual long-run cost.

The 30-year horizon also matters for resale value: a buyer’s inspector will note “mudjacking 8 years ago — likely needs redo soon” as a negative. A buyer’s inspector noting “PolyLevel install with 17 years remaining on transferable warranty” is neutral-to-positive.

When to Skip Leveling Entirely (and Choose Replacement)

Concrete leveling is the right answer when the slab is structurally sound and just settled. It’s the wrong answer when:

• The slab is cracked into 4+ pieces — lifting doesn’t fix the structural failure; replacement is needed
• Cracks are wider than 1/2 inch with vertical displacement — same as above
• The settlement is severe (>4 inches) — lifting more than 4” risks cracking the slab; replacement is often more economical
• Heave (not settlement) is the problem — the slab is being pushed up by expanding soil below, not falling because of voids. Leveling addresses the wrong direction; foundation heave repair is the answer
• The slab is over a structural foundation issue — if your house is also showing cracks (interior walls, exterior brick), the slab settlement is a symptom of foundation movement. Address foundation first via helical piers or push piers — leveling the slab without fixing the foundation just re-settles in 1-2 years

Slab replacement cost benchmarks (for comparison):

• Driveway (400 sqft): $4,000–$8,000
• Patio (200 sqft): $1,500–$3,500
• Basement floor (800 sqft): $6,000–$14,000

If replacement is cheaper than or comparable to PolyLevel pricing AND your slab has structural problems beyond settlement, replacement is often the right answer.

Decision Framework — Quick Verdict

If you…	Pick
Have a settled driveway/garage slab, want it fixed for 30+ years	Polyjacking (generic polyurethane from a reputable local contractor)
Are selling the home in 1-5 years and want documented repair	PolyLevel (transferable warranty is a resale asset)
Have a non-critical slab (garden path, secondary patio) on a tight budget	Mudjacking (cheapest upfront; accept 5-10 year lifespan)
Live on expansive clay soil where seasonal movement is a chronic problem	Polyjacking or PolyLevel (lightweight foam doesn’t worsen soil stress)
Have a sandy-soil property (FL, coastal)	Polyjacking or PolyLevel (waterproof, won’t erode)
Have major cracking, severe settlement (>4”), or foundation issues	Skip leveling — replace the slab OR fix foundation first
Want premium documentation for insurance / future legal needs	PolyLevel (includes report + transferable warranty)

Frequently Asked Questions

How long does mudjacking last vs polyjacking? Mudjacking typically lasts 5-10 years before re-settlement requires a redo. Polyjacking lasts 30+ years (most installs in soil that hasn’t actively shifted are still holding after 40 years). The difference is material: mudjacking slurry compresses and erodes; polyurethane foam stays in place permanently.

Can I have a slab partially mudjacked and partially polyjacked? Yes — hybrid approaches are common for large voids. Mudjacking fills the bulk of a deep void cheaply; polyjacking handles the final precision lift. Hybrid pricing typically lands between the two methods’ rates.

Is PolyLevel worth the premium over generic polyjacking? For homes you plan to sell in 1-5 years: yes, the transferable warranty is a real resale asset. For homes you’ll own long-term: maybe — the warranty period (25+ yrs) covers the practical useful life of the lift either way, so the marginal value is the documentation. Cost difference: typically $2,000-$5,000 on a residential driveway.

Why does my driveway keep sinking after mudjacking? Most likely the underlying soil is too weak to support the additional weight the mudjacking slurry added (~100 lbs/cu ft). When you re-mudjack, you compound the problem. Switching to polyurethane foam (which adds essentially no weight) usually breaks the cycle.

Will mudjacking or polyjacking damage my driveway’s appearance? Mudjacking leaves 1.5”-2” patches that are visibly different from the surrounding slab. Polyjacking and PolyLevel leave 5/8” holes that are barely visible after epoxy patching. For visible driveways or walkways, polyurethane methods are cosmetically much better.

Can I do mudjacking or polyjacking myself? No. Both require specialized equipment (hydraulic pumps, foam injection rigs, drill rigs) and trained operators. DIY attempts almost always result in over-lifting (cracking the slab) or under-filling (re-settlement). Costs for a DIY rig rental + materials often exceed hiring a contractor anyway.

How long does the install take? Mudjacking: 4-8 hours for a typical driveway, plus 24-48 hour cure before traffic. Polyjacking / PolyLevel: 2-4 hours for the same driveway, with 15-minute cure (you can drive on it the same day).

What’s the warranty difference? Mudjacking: 1-3 years from most contractors. Polyjacking: 5-10 years typical, varies by contractor. PolyLevel: 25-75 years, transferable to new owner.

Will leveling fix cracks in my concrete? No. Leveling addresses settlement (slab being below the proper level). Existing cracks remain unless the slab is sound enough to be lifted as one piece. Severely cracked slabs (4+ pieces) need replacement, not leveling.

How do I find a good contractor? Get 3 quotes from licensed concrete leveling specialists. Verify they have liability insurance ($1M+ recommended). For polyjacking, ask which foam brand they use (HMI, Alchemy-Spetec, NCFI/PolyLevel are reputable; generic single-component foams are not). For PolyLevel specifically, only Basement Systems / Foundation Supportworks dealers are authorized — verify dealer status before signing.

Get Concrete Leveling Estimates

Concrete leveling pricing varies significantly by region, slab condition, and contractor. The fastest way to compare apples-to-apples: get 3 quotes from local licensed contractors who will inspect the actual slab. Request 3 free quotes from concrete leveling specialists in your area.

If your slab settlement is severe enough to suggest deeper foundation issues, also see our helical pier foundation repair guide and foundation heave repair cost guide — settlement alongside other home cracking indicates the foundation itself may need underpinning, not just slab leveling.