If your driveway, sidewalk, or patio panel has sunk but the concrete itself is still structurally sound, you don't need to tear it out — you need to fill what's under it. Polyjacking injects high-density polyurethane foam through small 5/8-inch drill holes beneath the slab. The foam expands to fill voids, compacts loose subgrade, and lifts the slab back to grade — all within a few hours and without disrupting landscaping, adjacent structures, or the concrete surface. Return to use same day. Fixed-price quote within 48 hours.
Service availability note: We currently route concrete leveling and polyjacking projects to a vetted concrete partner crew. You still get our quoting process and project oversight — the on-site install crew is a specialist subcontractor we trust on this scope. Send us your project and we'll handle the match end-to-end.
Polyjacking and mudjacking both lift sunken slabs by injecting material under them — but the material is completely different and so are the results. Mudjacking pumps a cement-soil slurry under the slab. That slurry is heavy (adds 100 lbs/ft² to the slab load), takes days to cure, and eventually shrinks and erodes — which is often what caused the void in the first place. Polyjacking injects a two-part polyurethane foam that expands 25–30 times its liquid volume, cures in 15 minutes, weighs approximately 2 lbs per cubic foot, and is hydrophobic — water doesn't break it down over time.
The injection holes are 5/8 inch in diameter. Mudjacking holes are 1.5 to 2 inches. After polyjacking, the 5/8-inch holes are patched with a color-matched cementitious plug that's almost invisible. The drill pattern is planned based on void mapping — we don't inject randomly, we inject at the locations where the foam needs to go to achieve level.
Polyjacking is the right answer when the concrete is structurally sound and the problem is void or loose subgrade causing settlement. It is not the right answer when the slab has structural cracks running full-depth (the foam will lift but the panel will lift in sections), when the settlement exceeds about 3 inches (lifting that far in controlled passes is impractical), or when the cause of the void is active drainage failure that will re-form the void. We assess all of these on the estimate visit and will tell you honestly when replacement is the better call.
A typical residential polyjacking project is complete in 2–4 hours — drill, inject, patch, done. The slab is usable as soon as the hole patches are set, typically within 30–60 minutes of injection completion.
Tap test entire panel to map void extent. Confirm slab is structurally sound. Measure elevation differential. Confirm no active water source feeding the void. Fixed-price quote on-site.
Mark injection point locations based on void map — concentrated near the low corners, spaced to achieve even lift across the panel. Drill 5/8" holes through slab to void zone.
Inject structural polyurethane foam in controlled passes — start at low corner, work toward higher areas. Monitor slab elevation continuously. 1/2" maximum lift per pass to avoid cracking the panel. Multiple passes to reach target grade.
Check final elevation across full panel with level. Compare to adjacent panels. Re-inject if any area is still below target. Confirm joint gaps have closed to acceptable width.
Patch 5/8" drill holes with rapid-set mortar, finished flush. Re-caulk any control joints that opened during lift. Clean drill debris from surface. 60-day workmanship warranty issued.
Anderson & Pendleton: Madison County's glacial clay subgrade is prone to shrink-swell settlement — the clay compresses during dry summers and swells during wet springs, creating voids under slabs that aren't isolated from grade movement. This is the most common polyjacking scenario we see: a structurally sound driveway or patio panel that has dropped 1–2 inches on one corner from clay shrinkage.
Fishers & Noblesville: Subdivision development in Hamilton County sometimes involves improperly compacted backfill zones from utility trenches or grading. When a trench settlement void opens under a driveway panel years after construction, polyjacking is typically the right fix — the slab is sound, the void is localized.
Carmel: Pool decks in Carmel frequently develop settlement on the far edge away from the pool coping — the area that sees less load and more tree root activity. Polyjacking 2–3 panels back to flush with the coping is a cleaner solution than tearing out and repaving when the concrete surface itself is in good condition.
Westfield: Newer commercial development sometimes shows settlement at driveway approach and sidewalk panels within 5–10 years from utility trench consolidation. Polyjacking those early-failure panels saves the cost of a full replacement on concrete that's otherwise new.
Our polyurethane foam density specifications and slab lifting methodology follow ACI 230.1R "Report on Soil Cement" and industry guidelines from the American Concrete Pavement Association (ACPA) for slab stabilization and lifting using polyurethane injection — a recognized repair technique for concrete flatwork per ACPA TR-012.
REF · ACPA American Concrete Pavement Association — Slab Stabilization and Lifting Guidelines ↗The fastest way to a quote is a phone call. Prefer to send details instead? Fill in the form and we'll respond the same business day — usually within a couple of hours.
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Tell us the panel location, how much it has sunk, and whether the concrete surface itself is in good condition. We'll confirm it's a polyjacking candidate and quote on-site.