What is the price difference between mudjacking and poly levelling in NB?

Mudjacking costs $3–$6 per square foot in New Brunswick, while poly levelling (foam injection) runs $5–$10 per square foot — meaning poly levelling is roughly 50–80% more expensive per square foot for similar scope. Both methods lift settled concrete slabs without full replacement, but they differ in material, longevity, and application.

Mudjacking (also called slab jacking or grout pumping) works by drilling 1.5–2-inch holes through the settled slab and pumping a slurry of cement, soil, and water under pressure to fill voids and lift the slab. It's been used in NB for decades, uses locally sourced materials, and is well understood by the contractors who do it. The holes are patched after lifting. The limitation in NB is the slurry's weight — it adds significant mass to the problem area, and if the subsoil is soft or saturated (common in spring thaw conditions in Moncton, Fredericton, and river valley areas), the added weight can cause re-settling over time.

Poly levelling (polyurethane foam injection) drills smaller 5/8-inch holes and injects two-part expanding polyurethane foam that fills voids, expands, and lifts the slab with precision. The foam is lightweight (about 4 lbs per cubic foot versus 100+ lbs per cubic foot for mudjack slurry), cures in 15–30 minutes, and can be driven on within an hour. For driveways, patios, and sidewalks in NB, the lighter weight means less risk of re-settlement and better performance around foundation areas where added weight is a concern.

For NB homeowners, the price premium for poly levelling is often worth it for driveways, pool decks, and any slab near the foundation. Mudjacking remains a cost-effective choice for large areas like sunken parking pads, commercial walks, or warehouse floors where the cost difference is significant at scale.

Neither method is a DIY project — both require specialized pumping equipment and experience reading how a slab responds during lifting. Lifting too much or in the wrong sequence cracks the slab. New Brunswick Concrete can match you with experienced concrete levelling contractors in your area at no charge.