How Polyurethane Foam Leveling Works
Dallas Foundation Repair provides concrete leveling across Dallas and surrounding cities, backed by 15+ years of documented project experience and 4,850+ completed evaluations. The process raises settled flatwork back to a target profile by injecting high-density polyurethane foam underneath it. Small ports are drilled through the panel, the foam is injected, it expands to fill voids in the soil beneath, and continued injection lifts the slab while elevation is monitored from above.
The method is trenchless. Nothing is excavated, nothing is removed, and the surface is back in use the same day. The industry calls it polyjacking, foam jacking, concrete raising, or slab jacking depending on who is writing the brochure. It is flatwork correction, distinct from the structural foundation repair in Dallas that piers and underpinning address.
Which Surfaces Can Be Foam-Leveled?
Flatwork that sits on soil and carries only its own weight plus traffic: driveways and garage approaches, sidewalks and walkways, patios, pool decks, porch slabs, steps, and landings. Both residential and commercial properties across the Dallas-Fort Worth metro are candidates.
The requirements are straightforward. The panel needs to be largely intact rather than fractured into pieces. The sub-base needs to be capable of holding the raised position once voids are filled. And the settlement needs to be the kind that a lift actually resolves rather than a symptom of erosion that is still running.
Flatwork Leveling vs. Structural Foundation Repair
This is not structural foundation repair, and the distinction matters enough that we keep the services on separate pages.
A house foundation carries the structural load of the building. When it moves, the correction is underpinning: piers driven to bearing soil or rock, with the load transferred onto them. Foam under a slab does not reach bearing strata and does not carry structural load. Anyone offering to lift your house with foam is describing a different product than the one on this page.
If your concern is the house rather than the driveway, slab foundation repair is the relevant service and an evaluation is the right first step.
The Polyjacking Process Step by Step
Assessment. We confirm the panels are candidates, look at what caused the settlement, and check whether a lift will preserve drainage away from the structure.
Port drilling. Penny-sized holes are drilled through the panel in a pattern matched to its size and the void distribution beneath.
Injection. Two-part polyurethane foam injection begins through each port. The material expands on contact, filling voids first. Once voids are full, continued injection generates lift.
Monitoring. Elevation is watched continuously during the lift, because concrete raised past its target stresses the joints and neighbouring panels.
Patching. Ports are patched with a cement-based compound and the surface is returned to use, typically the same day.
Why Does Flatwork Settle in North Texas?
Dallas sits on Blackland Prairie clay - an expansive soil that shrinks during summer drought and drops whatever sits on it. Water washing fines out from under a slab, frequently from a downspout that has discharged at the same point for years or an irrigation line with a slow leak, creates voids the concrete then bridges until it cannot. Poor compaction at original placement never had the capacity in the first place. Tree roots displace soil directly and dry it indirectly.
Identifying which applies matters, because an active water source will simply create the next void. Where that is what we find, correcting the source comes first, and drainage work may be the more useful spend.
Drainage Slope and Trip-Hazard Correction
Two practical considerations shape most residential jobs.
Drainage first: flatwork is usually sloped on purpose. Raising a patio to dead level can flatten or reverse the fall and send water back toward the house. Our target profile always preserves fall away from the structure, even where that means accepting a slightly less perfect looking result.
Trip hazards second: a lip at a joint on a public-facing sidewalk or a main approach is a genuine liability, and it is one of the most common reasons homeowners and property managers in Oak Cliff, Lakewood, Lake Highlands, and Preston Hollow call. A lift that removes the lip solves the problem at a fraction of replacement cost.
What Does Your Quote Include?
Dallas Foundation Repair provides a written quote stating the panels treated, the target profile, drainage considerations, the expected lift, port patching, and any conditions we identified that would affect longevity - whether the job is in Plano, Garland, Mesquite, or east Dallas. Where we think replacement is the better answer, that is what the document says, and our guide on polyjacking versus mudjacking covers the method comparison in more detail.
