Concrete polyjacking is a method of lifting and leveling sunken concrete slabs by injecting a high-density, expanding polyurethane foam beneath them. The foam expands to fill voids, compact the soil, and raise the slab back to its desired level.

Small holes, roughly the size of a penny or a dime, are drilled through the concrete slab. Polyurethane foam is then injected in a liquid state, which expands and hardens, lifting the concrete and stabilizing the soil below.

Polyjacking offers several advantages, including:

• Smaller injection holes: Resulting in a more aesthetic finish.
• Faster cure time: The foam cures quickly, allowing for immediate use of the repaired area.
• Lightweight material: Reduces the risk of further soil compression.
• Durability and longevity: Resistant to moisture and soil movement.
• Water resistance: Hydrophobic foam is suitable for damp areas.
• Addresses underlying issues: Compacts soil to prevent future sinking.

Properly executed polyurethane foam repairs can last 20 years or more, potentially matching the remaining lifespan of the concrete itself.

While polyurethane foam is synthetic, it’s non-toxic and closed-cell, so it won’t leach into soil or groundwater. It reduces the need for demolition and replacement, cuts transportation emissions, and is recyclable.

Polyjacking is suitable for driveways, sidewalks, patios, walkways, pool decks, and even interior slabs.

• Cost: Can be more expensive than traditional mudjacking.
• Requires professionals: Needs trained experts and specialized equipment.
• Not suitable for severely damaged concrete: Replacement may be needed.
• Less lifting control: Foam expansion can sometimes over-lift.
• May not suit heavy loads: Not ideal for very high-traffic industrial areas.

Polyurethane concrete lifting typically ranges from $5 to $15 per square foot. It’s usually much less than the cost of tearing out and pouring new concrete. Final pricing depends on the area size, depth of voids, and site location.