Concrete Slab Leveling in Boise, ID

Polyurethane foam slab leveling typically runs $5-$10 per square foot of slab, plus a $300-$500 mobilization charge. A typical sunken garage floor or patio costs $1,500-$4,000 total — about 50-70% less than the $8,000-$12,000 for full replacement. Larger commercial slabs are often quoted by injection points rather than square footage.

Mudjacking uses a slurry of mud, sand, and cement injected under the slab. It works but requires large 2-inch ports, is heavier (adds 100+ lbs/cubic foot), takes 24-48 hours to cure, and the slurry can wash out over time. Polyjacking uses lightweight polyurethane foam through tiny 5/8-inch ports, cures in 15 minutes, is impervious to water, and lasts indefinitely. For residential work, polyjacking is the modern standard.

Polyurethane foam is chemically stable and doesn't break down, wash out, or compress over time. It carries a lifetime warranty on the material. As long as the underlying cause (drainage, plumbing leak) is addressed, polyjacked slabs stay level indefinitely.

When done properly with multiple injection points monitored by laser levels, lifting is even and the slab doesn't crack. However, slabs that are already heavily cracked or fractured may not be candidates for lifting — sometimes replacement is the right answer. We tell you honestly at the inspection whether your slab is liftable.

Polyurethane is rated for residential concrete slabs and most light commercial. For heavy industrial slabs (warehouse floors, machinery pads), we still use traditional mudjacking because its higher compressive strength is required. Pool decks, driveways, patios, walkways, and garage floors are all good candidates for polyjacking.