Polyjacking — also called polyurethane foam concrete leveling — is a method of raising settled concrete slabs by injecting high-density expanding foam beneath them. The foam fills voids, compacts the soil underneath, and lifts the slab back to its original position.
Small ports (about the size of a dime) are drilled through the slab. A two-part polyurethane mixture is injected through the ports. The material expands — filling voids, compacting weak soil, and applying upward pressure on the slab. The process is controlled precisely, lifting the concrete millimeter by millimeter to grade. Once in position, the ports are capped flush and the foam cures to full load-bearing strength in about 15 minutes.
Colorado's Front Range sits on some of the most expansive bentonite clay in the country. Clay swells when wet and shrinks when dry, creating the void-and-settle cycle that causes concrete problems. Polyurethane foam is inert, waterproof, and won't break down or wash away — it stabilizes the soil permanently rather than just filling it temporarily like mudjacking slurry.
Polyjacking works on any settled concrete slab that is structurally sound — the concrete itself doesn't need to be pristine, just not deteriorated past the point of repair. Driveways, sidewalks, patios, pool decks, garage floors, and commercial slabs are all common candidates.
Polyjacking lifts the slab, but it doesn't repair existing cracks or resurface damaged concrete. If a slab is extensively cracked, crumbling, or heaved (pushed upward rather than settled), tear-out may be the better option. We assess this on every free estimate.