Head-to-Head Comparison · 2026

Mudjacking (Slabjacking) vs.
Polyurethane Foam Injection (Polyjacking)

Our Verdict

Polyurethane foam injection is the superior technology for most slab-lifting applications. Its lightweight nature, waterproof properties, and rapid cure time make it the better long-term investment despite the higher upfront cost. Mudjacking remains a viable budget option for exterior slabs like driveways and sidewalks where the consequences of re-settling are minor and repeat treatment is acceptable. For interior floors, pool decks, or any application where the slab supports significant loads, polyurethane foam is the clear choice.

Quick Comparison

Factor	Mudjacking (Slabjacking)	Polyurethane Foam Injection (Polyjacking)
Cost Range	$500 – $1,500	$800 – $2,500
Average Cost	$900	$1,500
Duration	2-6 hours per area	1-3 hours per area
Longevity	5-10 years (may need repeat treatment)	10-25 years
Best For	Budget-conscious homeowners with settled concrete driveways, sidewalks, patios, or garage floors where cost is the primary concern	Interior slabs, pool decks, weight-sensitive applications, and homeowners seeking a longer-lasting, less invasive solution
Warranty	1-3 year warranty typical	5-10 year warranty typical; some companies offer lifetime

Mudjacking (Slabjacking): Pros & Cons

30-50% less expensive than polyurethane foam injection

Proven technology used successfully for over 60 years

Fills large voids effectively with a dense cement slurry

Environmentally friendly — uses natural materials (cement, sand, water)

Widely available from concrete contractors nationwide

Heavy material (100+ lbs per cubic foot) adds significant weight to already weak soil

Larger drill holes (1-2 inches) are more visible after patching

Slurry can shrink and settle over time, requiring repeat treatment

Longer curing time — 24-48 hours before full use

Not suitable for weight-sensitive applications like pool decks or lightly supported slabs

Slurry can be washed out by underground water over time

Polyurethane Foam Injection (Polyjacking): Pros & Cons

Extremely lightweight (2-4 lbs per cubic foot) — does not overload weak soils

Expands to fill voids completely, including irregularly shaped cavities

Cures in 15-30 minutes — slab is ready for use the same day

Tiny drill holes (5/8 inch) are nearly invisible after patching

Waterproof and does not wash out, shrink, or deteriorate underground

Precise lift control — foam expansion is monitored in real time with lasers

50-70% more expensive than traditional mudjacking

Not biodegradable — foam remains permanently in the ground

Less effective for very large voids where massive volumes of fill are needed

Requires specialized equipment and certified installers

Foam expansion can occasionally over-lift if not carefully controlled

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Frequently Asked Questions

How much does concrete leveling cost per square foot?

Mudjacking typically costs $3 to $6 per square foot, while polyurethane foam injection runs $5 to $10 per square foot. Both are significantly less expensive than replacing the concrete entirely, which costs $8 to $15 per square foot. The exact price depends on the number of slabs, void depth, and accessibility.

Can mudjacking or foam lifting fix foundation settlement?

These methods are designed for concrete slab lifting, not structural foundation repair. They can level a settled garage slab, driveway, or basement floor, but they should not be used as a substitute for pier underpinning when the foundation itself has structural settlement. A structural engineer can determine whether slab lifting or foundation repair is needed.

How long does each repair last?

Mudjacking typically lasts 5 to 10 years, though repeat treatments are common if the underlying soil conditions that caused the original settlement remain unchanged. Polyurethane foam lasts 10 to 25 years and is less susceptible to repeat failure because the foam does not shrink, wash out, or add significant weight to the soil.

Can I drive on my driveway immediately after the repair?

With polyurethane foam lifting, you can drive on the slab within 30 minutes to 1 hour after the repair. The foam reaches 90% of its final strength within 15 minutes. Mudjacking requires 24 to 48 hours of curing time before the slab can handle vehicle traffic. Plan accordingly if your driveway is the only parking option.

More Comparisons

Carbon Fiber Straps vs. Steel I-Beams (Wall Braces)

$5,000 vs. $8,000 avg.

Interior Waterproofing vs. Exterior Waterproofing

$4,000 vs. $10,000 avg.

Steel Push Piers vs. Helical Piers

$1,600 vs. $2,000 avg.

Professional Foundation Repair vs. DIY Foundation Repair

$5,500 vs. $600 avg.

Foundation Repair vs. Foundation Replacement

$8,000 vs. $45,000 avg.

Wall Anchors vs. Carbon Fiber Straps

$750 vs. $550 avg.

Foundation Piering vs. Mudjacking (Slabjacking)

$12,000 vs. $1,500 avg.

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