# Concrete Leveling San Antonio | Polyjacking Quotes > Need concrete leveling in San Antonio? We lift settled driveways, patios, and sidewalks with polyurethane foam. Request a written quote with scope details. URL: https://sanantoniofoundationrepair.net/concrete-leveling/ ![San Antonio Foundation Repair technician injecting polyurethane foam to lift a settled residential driveway](/images/misc/technician-injecting-high-density-polyurethane-foa.webp) # Concrete Leveling for San Antonio Flatwork Last updated: September 16, 2026 Concrete leveling for San Antonio residential and commercial flatwork - driveways, patios, sidewalks, and pool decks lifted with polyurethane foam injection. - description Written scope and exclusions - straighten Elevation measured first - engineering Engineer coordination where required request\_quote Request a Foundation Repair Quote [/request-quote/ →](/request-quote/) call (210) 555-7437 [tel:+12105557437 →](tel:+12105557437) - description Written scope, exclusions, and warranty terms with every quote - straighten Elevation measurement before any repair recommendation - foundation Slab-on-grade and pier-and-beam foundations - place San Antonio and surrounding Bexar, Guadalupe, and Comal communities ![Polyjacking injection holes patched flush on a San Antonio residential patio](/images/misc/close-up-of-small-drilled-injection-holes-patched-.webp) ## How Polyurethane Foam Injection Works San Antonio Foundation Repair provides concrete leveling - also called slab lifting - for residential and commercial flatwork across San Antonio and surrounding Bexar County communities. The process uses high-density polyurethane foam injected beneath the settled slab to raise it back to grade. Flatwork means the concrete that carries no building load: driveways, patios, sidewalks, pool decks, steps, and landings. That distinction matters: flatwork leveling is cosmetic and functional work on non-structural concrete, not foundation repair in San Antonio [/ →](/) in the structural sense. The method is straightforward. Small ports are drilled through the slab. Foam is injected through them. It expands underneath, first filling the void that let the slab drop and then lifting the concrete back toward its original position. The ports are patched flush and the surface goes back into use, usually the same day. This is non-excavation lifting. Nothing is dug up, nothing is demolished, and there is no spoil pile in the yard. ## Why San Antonio Flatwork Settles Concrete does not sink. The ground beneath it moves or washes away, and the concrete follows. **Soil erosion and subgrade washout.** Water tracking under a slab carries fine material away with it. Downspouts discharging at a driveway edge, a leaking irrigation line, or a poorly graded approach will hollow out a void over a few seasons. **Poor initial soil compaction.** Fill placed during construction that was never adequately compacted continues to consolidate under load. This is why a driveway on a cut-and-fill lot can settle noticeably within a decade while the one next door does not. **Expansive clay shrinkage.** In dry periods, clay under flatwork shrinks and the slab loses support. San Antonio’s Houston Black and Heiden clay soils are particularly prone to this shrink-swell cycle. Some of this recovers when the soil takes up moisture again, which is why a driveway can appear to move seasonally before it settles for good. **Tree roots and organic material.** Roots displace soil, and organic material decomposes and leaves a void. The cause matters. Lifting a slab over an active washout gives you a level surface and a repeat visit. We see this pattern across the San Antonio metro - from Helotes and Universal City to Schertz and Cibolo. Where we can identify the source, we point it out, and where drainage correction [/drainage-improvements/ →](/drainage-improvements/) is the real answer we say so. ## Which Surfaces Qualify for Lifting? **Good candidates:** - Sunken sidewalks and walkway panels, especially where a lip has become a trip hazard. - Uneven driveway slabs, including the approach and apron where vehicles catch. - Settled patios that have dropped relative to a door threshold. - Pool deck leveling where a panel has dropped around the coping. - Concrete steps and landings that have separated from a structure. - Garage slabs that have dropped at the entry. The common factor is that the concrete is structurally sound. Whether it is a single-family home’s driveway or a commercial property’s warehouse apron, the slab may be cracked in one or two places and it may be weathered, but it holds together as a unit. **Poor candidates:** - Concrete broken into many fragments, which will move independently rather than lift as a unit. - Heavy spalling where the surface is delaminating and the aggregate is exposed. - Extensive map cracking across the surface. - Slabs with exposed, corroded reinforcement. - Concrete that is simply too thin for the load it now carries. Foam lifts concrete. It does not restore concrete. Where the material has failed, replacement is the honest recommendation, and our guide on concrete leveling versus replacement [/guide/concrete-leveling-vs-replacement/ →](/guide/concrete-leveling-vs-replacement/) sets out the criteria in more detail. ## Polyjacking vs. Mudjacking Both methods lift concrete by injecting material underneath it. The differences are practical. | | Polyurethane lifting | Mudjacking | | --- | --- | --- | | Injected material | High-density polyurethane foam | Cementitious slurry | | Port size | Small, roughly coin-sized | Considerably larger | | Added weight | Light | Substantial | | Cure time | Hours, often less | Longer | | Void filling | Expands to fill irregular voids | Fills but may leave gaps | | Best suited to | Most residential flatwork | Large voids, some commercial work | For residential driveways, patios, and walkways, polyurethane is usually the better fit. Adding significant weight to a subgrade that has already proved unable to hold what was on it is not always the right move. ## What to Expect During the Process **Assessment.** Slab thickness and condition, the size and shape of the drop, evidence of void extent, the presence of utilities beneath the slab, and the original drainage intent. **Port layout.** Ports are placed to reach the void efficiently and to distribute lifting force evenly. Placement also considers appearance where that matters to you. **Injection and lift.** Foam goes in under controlled pressure. Void filling happens first, then lift begins. The slab is monitored continuously, because the objective is a controlled return to grade rather than the maximum achievable height. **Slope check.** Drainage slope preservation is verified before injection stops. Making a patio dead level when it was intentionally sloped to shed water toward a drain is a failure, not a success. **Patching and handover.** Injection hole patching is done flush. Cure time is stated for the product used, and in most cases the surface takes traffic the same day. ## Flatwork Leveling vs. Foundation Repair Concrete leveling is flatwork. It is not foundation repair. Your driveway settling does not establish that your house foundation has moved, and a sound house foundation does not mean the walkway is fine. They sit on the same ground but they carry entirely different loads, and San Antonio Foundation Repair assesses each separately. If you have both concerns, mention both when you request a quote and the evaluation will cover each on its own terms. ## How Much Does Slab Leveling Cost? | Factor | Why it changes the cost | | --- | --- | | Area being lifted | Square footage of slab moved | | Height of lift | Greater lift means more material | | Void volume | Not fully known until injection begins | | Slab condition | Cracked slabs need more care and more ports | | Access | Equipment reach and hose runs | | Drainage correction | Where the cause needs addressing, that is separate scope | Because void volume cannot be measured precisely beforehand, our written quote (2026 pricing) states the basis for pricing and how any variance is handled. A number that quietly changes on completion day is not a quote. What is included with every quote - check Polyurethane foam injection for supported flatwork - check Assessment of which surfaces can be leveled - check Trip-hazard remediation and void filling - check Non-excavation approach with cost factors explained How we work ## Why Choose Us for Concrete Leveling fact\_check ### We assess before we lift Slab thickness and condition decide whether lifting is viable. Heavily cracked or spalled concrete gets an honest replacement recommendation instead. water\_drop ### Cause considered, not just symptom Subgrade erosion and washout usually has a source. We look for it, because lifting a slab over an active washout buys you a short reprieve. stairs ### Drainage slope preserved Flatwork is often sloped deliberately. We plan the lift around drainage slope preservation rather than making everything dead flat. schedule ### Minimal disruption Non-excavation lifting means small injection holes rather than demolition, no spoil piles, and a surface usable within hours in most cases. warning ### Trip hazards prioritised Where a lip presents a genuine trip hazard, remediation gets priority in the scope and the sequence. balance ### Honest about the alternative Mudjacking versus polyurethane lifting versus replacement: we explain the trade-offs rather than defaulting to the method we prefer to sell. From request to completion ## How Concrete Leveling Works, Step by Step 1. 01 search ### Assess the flatwork We check slab thickness and condition, the size of the drop, subgrade erosion and washout, and whether the concrete is sound enough to lift. 2. 02 grid\_on ### Port layout and scope Injection port locations are planned and the scope, including expected lift and injection hole patching, is put in writing. 3. 03 construction ### Injection and lifting High-density polyurethane foam is injected through small ports, expanding to fill voids and raise the slab in controlled stages. 4. 04 task\_alt ### Patch and hand back Ports are patched flush, drainage slope preservation is checked, and the surface is usable after the short cure time. ## Have a question about concrete leveling? Describe what you are seeing and we will tell you plainly whether it warrants an evaluation. call (210) 555-7437 [tel:+12105557437 →](tel:+12105557437) Request a Quote [/request-quote/ →](/request-quote/) ## How San Antonio Foundation Repair Compares | Criterion | Typical provider | SA Foundation Repair | | --- | --- | --- | | Candidacy assessment | Lift whatever is booked | Slab condition assessed; replacement recommended where warranted | | Cause investigation | Not considered | Subgrade erosion and washout sources identified | | Drainage | Level everything | Intended drainage slope preserved | | Surface finish | Holes left rough | Injection holes patched flush | | Return to use | Unstated | Cure time stated per product and project | Comparison describes our own documented process against general industry practice. No specific competitor is named or characterised. What the work looks like ## Concrete Leveling in Practice Illustrative images of the equipment, conditions, and stages involved. Documented project photography is published separately with the project record. In their words ## What Customers Say About Our Concrete Leveling format\_quote > The driveway lip had been catching the car for years. Small holes, a couple of hours, and it was gone. Homeowner Live Oak format\_quote > They told me one section of the walkway was too far gone to lift and should be replaced. I appreciated not being sold the easier job. Homeowner Leon Valley format\_quote > The quote laid out the method, what was included, and what wasn't. It made comparing proposals much easier. Homeowner Converse These are illustrative, scope-focused examples pending replacement with verified customer reviews. We do not publish invented ratings or review counts. Read our review policy [/reviews/ →](/reviews/) . ## Guides on Concrete Leveling Longer explanations of the questions that come up most often on this topic. ### What Concrete Leveling (Polyjacking) Involves How polyurethane concrete lifting works: injection ports, foam expansion, void filling, cure time, and the non-excavation benefit. Read guide arrow\_forward [What Concrete Leveling (Polyjacking) Involves →](/guide/what-concrete-leveling-polyjacking-involves/) ### Which Concrete Surfaces Can Be Leveled Help judging whether your flatwork is a leveling candidate: suitable surfaces, when leveling isn't viable, trip-hazard remediation, and condition factors. Read guide arrow\_forward [Which Concrete Surfaces Can Be Leveled →](/guide/which-concrete-surfaces-can-be-leveled/) ### Concrete Leveling vs. Replacement Compare lifting versus tearing out and repouring concrete: criteria, cost and disruption tradeoffs, longevity, and when replacement wins. Read guide arrow\_forward [Concrete Leveling vs. Replacement →](/guide/concrete-leveling-vs-replacement/) Questions we are asked ## Concrete Leveling FAQs ### How does concrete leveling actually work? expand\_more Small ports are drilled through the settled slab, typically around the diameter of a coin. High-density polyurethane foam is injected through those ports. The foam expands underneath the concrete, first filling the voids that allowed the slab to drop and then, as it continues to expand, applying upward pressure that lifts the slab. Lifting is controlled by managing injection volume and monitoring the slab as it moves. The ports are then patched flush. ### What is polyjacking and how is it different from mudjacking? expand\_more Polyjacking is the polyurethane foam method described above. Mudjacking, the older approach, pumps a cementitious slurry through larger holes to achieve the same lift. Mudjacking uses larger ports, adds considerable weight to the subgrade, and takes longer to cure. Polyurethane is lighter, uses smaller ports, and cures faster. Mudjacking still has applications, particularly on large voids, but for most residential flatwork polyurethane is the more practical choice. ### Which surfaces are good candidates for leveling? expand\_more Structurally sound concrete that has settled as a unit. That covers uneven driveway slabs, settled patios, sunken sidewalks, pool deck leveling, and concrete steps and landings. The test is whether the slab is intact enough to be lifted as a piece. A slab in two or three large pieces can often still be lifted. A slab that has broken into many fragments cannot. ### When is leveling not viable? expand\_more When the concrete itself has failed. Heavy spalling where the surface is delaminating, extensive map cracking, exposed and corroded reinforcement, or a slab broken into many pieces all point to replacement rather than lifting. Foam can raise concrete but it cannot restore concrete that has lost its integrity. We will tell you when that is the situation rather than lifting something that will fail again shortly. ### Why did my concrete settle in the first place? expand\_more Usually because the material supporting it moved or left. Common causes in this area are soil compaction over time under poorly prepared subgrade, subgrade erosion and washout from water tracking under the slab, expansive clay shrinking during dry periods, and settlement of fill placed during construction. Identifying the cause matters, because lifting a slab over an active washout is a short-term result. ### How long does the foam take to cure? expand\_more Polyurethane cures quickly. Most residential surfaces are usable within hours of injection, and in many cases much sooner. The exact figure depends on the product used, ambient temperature, and the volume injected, so we confirm it per product and project rather than quoting a single number. This is one of the main practical advantages over mudjacking. ### Will the injection holes be visible? expand\_more The holes are small and they are patched flush with a cementitious material on completion. On an older weathered driveway the patches will be visible on close inspection because new material does not match aged concrete. On a broom-finished surface they blend reasonably well. If appearance is a priority, say so and we will plan port placement with that in mind. ### Can you level a slab that is also cracked? expand\_more Sometimes, and it depends on the crack. A slab with one or two clean cracks can usually be lifted, though the sections may move slightly differently and the crack may need sealing afterwards. A slab with extensive cracking is likely to move as fragments rather than as a unit, which produces a poor result. Slab thickness and condition are assessed before any commitment is made. ### Does leveling fix the drainage? expand\_more Not by itself, and it can affect it. Flatwork is usually sloped deliberately to shed water away from a structure. Lifting a slab changes that geometry, so drainage slope preservation is part of the planning rather than an afterthought. Where water pooling was the original cause, correcting the drainage is a separate piece of work that belongs in the conversation. ### Is concrete leveling related to foundation repair? expand\_more They are different services addressing different structures. Flatwork sits on the ground and carries no building load, so lifting it is a surface-level correction. A house foundation carries the structure and is repaired with piers reaching a load-bearing stratum. Settled flatwork does not mean the house foundation has moved, and a sound house foundation does not mean the driveway is fine. They are assessed separately. ### How much does concrete leveling cost? expand\_more It tracks the area being lifted, the height of the lift, the volume of foam required to fill voids, and access for the equipment. A single sunken sidewalk panel and a full driveway approach are very different jobs. Because void volume is not fully known until injection begins, our written quote states the basis for pricing and how any variance is handled rather than presenting a figure that quietly changes. ### What is the cheapest way to level a concrete floor? expand\_more For exterior flatwork like driveways, patios, and sidewalks, polyurethane foam injection is typically less expensive than full replacement because it avoids demolition, disposal, forming, and pouring. Mudjacking costs less per job in some cases but adds significant weight to an already compromised subgrade. Self-leveling compounds work for thin indoor corrections but do not address structural settlement underneath. The right method depends on the cause of the problem and whether the existing concrete is sound enough to lift. ### Is leveling cheaper than replacing the concrete? expand\_more Usually, when the concrete is sound. Lifting avoids demolition, disposal, new material, forming, pouring, and cure time, and it avoids the disruption of having a driveway out of service for days. When the concrete has genuinely failed, replacement is the better value because lifting compromised concrete does not produce a durable result. Our guide comparing leveling with replacement sets out the criteria. ### Can you level a pool deck? expand\_more Pool deck leveling is a common application, and the settled panel around a pool is often exactly the sort of trip hazard worth addressing. The considerations are the same: the concrete needs to be sound, the void needs to be fillable, and the finished slope needs to keep water moving away from the pool structure rather than toward it. Coping and tile edges need care during the lift. ## Related Services foundation ### Slab Foundation Repair Evaluation, potential repair systems, access, scope, and restoration for slab-on-grade foundations. Learn more arrow\_forward [Slab Foundation Repair →](/slab-foundation-repair/) water\_drop ### Drainage Improvements Drainage improvement services in San Antonio - French drains, catch basins, surface swales, and gutter extensions to manage moisture around residential foundations. Learn more arrow\_forward [Drainage Improvements →](/drainage-improvements/) linear\_scale ### Crack Repair Foundation crack repair in San Antonio covering cosmetic filling, sealing, and structural work for residential and commercial properties. Learn more arrow\_forward [Crack Repair →](/crack-repair/) ![](/images/misc/restored-residential-driveway-and-walkway-sitting-.webp) No obligation, no pressure ## Ready to talk about concrete leveling? Tell us about your property and what you are noticing. We will contact you to discuss the project and the next step toward a quote. request\_quote Request a Foundation Repair Quote [/request-quote/ →](/request-quote/) call (210) 555-7437 [tel:+12105557437 →](tel:+12105557437) - check\_circle Written scope and exclusions - check\_circle Elevation measured before any recommendation - check\_circle We say when repair is not needed