Commercial Concrete Repair & Replacement

Commercial Concrete Repair & Replacement

Commercial Concrete Repair & Replacement in San Antonio | Affordable Concrete San Antonio
Commercial Concrete Guide · San Antonio, TX

When a commercial slab cracks, sinks, or spalls, the real question is whether to repair it or tear it out. This guide breaks down how to tell the difference, what each option costs in San Antonio, and how to get the work done without shutting your business down.

Commercial concrete repair San Antonio Concrete replacement vs. repair Cost guide · Downtime planning Parking Lots · Sidewalks · Slabs Updated 2026
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Affordable Concrete San Antonio · Editorial Team
With over 10 years of commercial and residential concrete experience across San Antonio and Bexar County, our crews have repaired and replaced parking lots, loading docks, sidewalks, and warehouse slabs for property managers, retailers, and industrial sites throughout the region. Every guide we publish reflects real on-the-ground experience, not generic contractor advice.
· affordableconcretesanantonio.com · Licensed & Insured · $2M Liability Coverage
Part of our commercial concrete services guide
Sidewalks, Walkways & ADA Concrete Ramps
→
40–60%
Typical savings of a targeted repair versus full slab replacement when the base is still sound
1/2"
Vertical sidewalk displacement that triggers an ADA ramp requirement and trip-hazard liability
30+yrs
Service life of a correctly poured, jointed, and sealed commercial slab in South Texas
24–72hrs
Window before light traffic on a repair; high-early-strength mixes can shorten it

For a commercial property, failing concrete is more than an eyesore. A cracked parking lot, a sunken sidewalk, or a spalling loading dock creates trip-hazard liability, slows operations, and gets worse every season it is ignored. The good news is that most commercial concrete problems in San Antonio do not require a full tear-out. The trick is knowing which ones do.

This guide walks through the repair-versus-replace decision, the most common failures we see on San Antonio commercial slabs, the repair methods that actually hold up in our clay soils and heat, and what full replacement involves when it is the only sound option. Every section includes the cost ranges and questions you need before approving any scope of work.

The principle behind every repair-or-replace decision: fix the surface only when the base underneath is still sound

Concrete fails for two very different reasons. Either the slab itself is damaged while the ground beneath it is stable, or the subgrade has moved and taken the slab with it. The first is a repair. The second is usually a replacement, because patching a slab sitting on a failed base just buys you a year or two before the same crack returns. In San Antonio, where expansive clay soil swells and shrinks with every wet and dry cycle, base failure is the single most common reason a repair does not last. Diagnose the base first, then choose the fix.

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Five decisions behind every commercial concrete project
From diagnosis to replacement, every commercial concrete decision covered
01
Repair or replace: the commercial decision framework
How to weigh remaining service life, cost, and liability before approving any scope
Decision
Commercial Concrete Repair & Replacement

Every commercial concrete decision starts with one question: is the slab worth saving? The answer is rarely about the cracks you can see. It is about the condition of the base beneath the slab, how much of the surface is affected, and how the repair cost compares to the remaining useful life you would get from it.

Repair makes sense when: the base is stable, damage is localized (under roughly 30 to 40% of the slab area), cracks are narrow with no vertical displacement, and the slab still has years of service life left. Targeted repairs typically cost 40 to 60% less than replacement and can often be done overnight or in sections.

Replacement makes sense when: the base has failed, damage is widespread, the slab has heaved or settled unevenly, or repeated past repairs have already failed. Pouring good money into a slab on a bad base is the most common waste we see on commercial sites.

Repair: base sound · damage under ~40% · no major displacement Replace: base failed · widespread cracking · repeated repair failures Gray area: get a core sample or subgrade assessment first
$4–8/sqft
repair
Targeted repair (crack injection, joint reseal, partial patch): The lowest-cost path when the slab is structurally sound. Restores function and appearance without disrupting operations.
$8–14/sqft
lift / overlay
Slab lifting or resurfacing: Mid-range. Raises settled slabs back to grade, or puts a new wear surface over sound concrete. Far cheaper than tear-out when the base can be stabilized.
$10–18/sqft
replace
Full removal and repour: Demolition, haul-off, base rebuild, and a new slab. The right call when the base has failed, but the most expensive and disruptive option.
🏗️ San Antonio base note: Bexar County sits on expansive clay (Vertisol) that swells when wet and shrinks when dry. That movement is the number one reason a commercial repair fails early. Before approving any patch, confirm whether the problem is the slab or the ground under it. A small subgrade assessment can save a five-figure mistake.
Repair-or-replace checklist
  • Base condition assessed: is the subgrade stable, or has it moved?
  • Percentage of slab affected estimated: localized damage favors repair, widespread favors replacement
  • Vertical displacement measured at cracks and joints: flat cracks repair well, offset cracks signal base movement
  • Repair history reviewed: a slab that has been patched repeatedly is usually a replacement candidate
  • Repair cost compared against remaining service life, not just the replacement price
02
Common commercial concrete failures in San Antonio (and what causes them)
Cracking, spalling, settlement, heaving, joint failure, and trip hazards
Diagnosis
Commercial Concrete Repair & Replacement

Before you can choose a fix, you need to know what you are actually looking at. The same crack can be a cosmetic shrinkage line or the first sign of a failing base. Here are the failures we see most often on San Antonio commercial concrete and what each one tells you.

Hairline / Shrinkage Cracks
Thin cracks (under 1/4") that appear as concrete cures and loses moisture. Usually cosmetic, with no vertical displacement and no movement over time.
Seal them early so water cannot reach the base. Left open, even cosmetic cracks let moisture into the subgrade.
Structural Cracks
Wide cracks, cracks with one side higher than the other, or cracks that keep growing. These point to base movement, overload, or clay swelling rather than simple curing.
A surface patch will not hold. These need full-depth repair or, if the base has failed, panel replacement.
Spalling & Scaling
The top surface flakes, chips, or breaks away, exposing aggregate. Common causes are poor finishing, deicing salts, a high water-to-cement ratio, or freeze events.
Often surface-only. If the slab below is sound, a partial-depth patch or overlay restores it without a full pour.
Settlement (Sunken Slabs)
Sections drop below their original grade, often where the subgrade washed out or was never compacted properly. You see low spots, pooling water, and uneven joints.
If the slab is intact, foam lifting or mudjacking can raise it back to grade, far cheaper than tear-out.
Heaving (Raised Slabs)
Sections push upward, usually from clay swelling after heavy rain or from tree roots under the slab. Creates raised edges and trip hazards at joints.
Minor lips can be ground down. Severe heaving means the base is moving and the panel may need replacement.
Joint & Edge Failure
Control and expansion joints open up, dry out, or fill with weeds and debris. Edges crumble where joints have failed and let water reach the base.
Cheap to fix and high value. Cleaning and resealing joints prevents the base damage that leads to bigger repairs.
ADA note

A displaced commercial sidewalk is a liability, not just a repair item. Under ADA accessibility rules, a vertical change in level over 1/4 inch must be beveled, and anything over 1/2 inch generally requires a ramp rather than an abrupt edge. On a commercial property open to the public, a raised slab edge is both a trip hazard and a documented accessibility violation. If a sidewalk panel has heaved or settled at a joint, treat it as a priority, not a someday item.

Diagnosis checklist
  • Crack width measured: under 1/4 inch and flat is usually cosmetic; wider or offset is structural
  • Vertical displacement checked at every joint and crack along public walkways
  • Spalling and scaling noted: surface-only breakdown can often be resurfaced
  • Drainage observed: standing water near the damage points to a base or grading problem
  • Photos and measurements documented for insurance, ADA, and contractor scoping
03
Commercial concrete repair methods and when each applies
Crack injection, slab lifting, partial and full-depth patching, overlays, and grinding
Repair Methods
Commercial Concrete Repair & Replacement

Once you know the slab is worth saving, the repair method depends on the type and depth of the damage. Using the wrong method, such as a surface patch over a structural crack, is why so many commercial repairs fail within a year. These are the methods that hold up in San Antonio.

Method Best for What it does Notes
Crack injection Narrow structural or active cracks Fills and bonds the crack through the full depth of the slab Epoxy for structural bonding; polyurethane for moving or wet cracks
Slab lifting Settled but intact slabs Raises the slab back to grade by injecting fill underneath it Polyurethane foam is fast and light; mudjacking is lower cost
Partial-depth patch Localized spalling and joint spalls Removes and replaces only the damaged top layer Needs a clean, square cut and a proper bonding agent
Full-depth repair Through-slab cracks, broken panels Removes and repours the full panel thickness Often dowelled to adjacent panels for load transfer
Resurfacing / overlay Worn or scaled but sound slabs Bonds a new wear surface over the existing concrete Restores look and texture; only works on a stable base
Joint resealing Open, dried, or weed-filled joints Cleans and refills control and expansion joints Cheap, high-value maintenance that keeps water out
Diamond grinding Minor trip-hazard displacement Grinds a raised edge down to remove the lip Fast ADA fix for displacement under about 1/2 inch
Match the method to the cause, not just the symptom

A crack that keeps coming back after injection is telling you the base is moving, no matter how good the injection was. A scaled surface that gets resurfaced will scale again if the original cause (poor finishing, deicing salts, or a high water-to-cement ratio) is not addressed. The repair method buys you time only when it is paired with the actual fix for what caused the damage. On a commercial site, that usually means addressing drainage and subgrade first.

Repair method checklist
  • Method matched to damage type and depth, not just appearance
  • Structural cracks injected full-depth, not surface-sealed
  • Settled slabs evaluated for lifting before tear-out is quoted
  • Bonding agent and proper cut specified for any partial-depth patch
  • Joint resealing scheduled as routine maintenance, not just after failure
04
Full replacement: process, specification, and minimizing downtime
What a proper commercial tear-out and repour involves, and how to keep operating
Replacement
Commercial Concrete Repair & Replacement

When the base has failed or damage is too widespread to patch, replacement is the only fix that lasts. A commercial repour is more than pouring concrete in the same hole. The base rebuild is what determines whether the new slab outlives the old one, and on a working property, the sequencing matters as much as the spec.

Phase 1: Demo and haul-off of the failed slab Phase 2: Subgrade repair, compaction, and base rebuild Phase 3: Reinforcement, forms, and jointing layout Phase 4: Pour, finish, cure, and seal

Specification for commercial slabs in San Antonio: 6 inch minimum thickness for parking and drive areas, heavier for truck and dock traffic, over a compacted crushed-limestone base of 6 inches or more. Use a rebar grid (not just wire mesh) for load transfer, with sawn control joints on a tight grid to manage the cracking that clay soil movement will eventually cause.

Downtime tip

You usually do not have to close to replace concrete. Most commercial replacements can be phased so that only part of a lot or walkway is closed at a time, and high-early-strength mixes can bring a section back to light traffic in 24 to 48 hours instead of the standard 7 days. Night and weekend pours are common for retail and restaurant sites. Build the phasing plan into the contract up front so operations and the crew are working from the same schedule.

Replacement checklist
  • Cause of failure identified and corrected before repour (drainage, subgrade, load)
  • Base rebuild specified: excavation depth and compacted limestone base in writing
  • Slab thickness and reinforcement matched to the actual load (parking vs. truck vs. dock)
  • Control and expansion joint layout planned, not left to chance
  • Phasing and cure schedule agreed so the business keeps operating
  • High-early-strength mix considered where fast reopening matters
05
Choosing a commercial contractor and protecting the new work
Vetting, contracts, and the maintenance that makes a slab last decades
Contractor & Care
Commercial Concrete Repair & Replacement

Commercial concrete is unforgiving of shortcuts, and the difference between a slab that lasts 30 years and one that fails in 8 is almost always the crew and the prep, not the concrete itself. Vet the contractor the same way on a repair as on a full replacement.

What to check What a good commercial contractor provides Red flag response
Liability insurance Certificate of insurance on request, $1M+ general liability, with commercial references "We're covered" with no documentation
Scope detail Written scope: cause of damage, method, base prep, thickness, reinforcement, joints A flat per-foot price with no diagnosis
Diagnosis Inspects and explains why the concrete failed before quoting a fix Quotes a patch without checking the base or drainage
Phasing plan A written plan to keep your site operating during the work No plan for access, traffic, or downtime
References Photos and contacts from commercial jobs in San Antonio Residential-only portfolio for a commercial slab
Warranty Written workmanship warranty on the repair or pour Verbal assurances only
⚠️ The most common commercial concrete mistake in San Antonio: approving the cheapest patch quote without a diagnosis. A crew that fills a crack for a low price without checking the base will be back, except you will be paying again and the liability clock keeps running. On a commercial property, the cheapest quote is rarely the lowest total cost. Get the cause documented in writing before you approve a repair.
Care tip

Sealing and joint maintenance are what protect the investment. Reseal joints before they open up and let water reach the base, pressure wash and reseal the surface on schedule, and fix small cracks in the first season before clay movement widens them. A few hundred dollars of annual maintenance routinely adds a decade to a commercial slab in our climate.

Contractor and maintenance checklist
  • Insurance certificate verified, $1M+ general liability, commercial references checked
  • Written scope includes the diagnosed cause, not just the repair price
  • Phasing and downtime plan agreed before work starts
  • Workmanship warranty provided in writing
  • Joint resealing and surface sealing scheduled as ongoing maintenance
  • Small cracks filled in the first season before they widen
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Quick reference by problem type
Common commercial concrete problems and the right fix

Use this table to match what you are seeing on your property to the likely cause and the most cost-effective fix. When in doubt between repair and replacement, the deciding factor is almost always the condition of the base.

Problem Likely cause Repair or replace Typical method & cost
Hairline / shrinkage cracks Normal curing, minor surface stress Repair Crack fill or seal · $2–5/linear ft
Wide or displaced cracks Base movement, overload, clay swelling Repair or replace Injection if base sound; replace panel if not · $6–14/sqft
Surface spalling / scaling Poor finishing, salts, freeze events Repair Partial-depth patch or overlay · $4–9/sqft
Settled / sunken slab Subgrade washout or compaction loss Repair Foam lifting or mudjacking · $5–12/sqft
Heaved / raised slab Clay swelling, tree roots, moisture Repair or replace Grind small lips; replace if severe · varies
Failed / open joints Age, dried sealant, water intrusion Repair Clean and reseal joints · $3–6/linear ft
Trip hazard at sidewalk Heaving or settlement at a joint Repair Diamond grinding or lift · $200–600/location
Broken panels / widespread failure Base failure, end of service life Replace Full removal and repour · $10–18/sqft
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Commercial concrete project checklist
Work through before approving any commercial repair or replacement scope
Assessment and documentation
  • Cause of damage diagnosed in writing: slab problem or base problem
  • Crack widths and vertical displacement measured and photographed
  • Drainage and standing-water issues noted near the damage
  • ADA trip hazards on public walkways flagged as priority items
Scope and specification
  • Repair-versus-replace decision based on base condition, not just visible cracks
  • Method matched to damage type: injection, lifting, patch, overlay, or repour
  • For replacement: base rebuild depth, slab thickness, and reinforcement specified
  • Control and expansion joint layout included in the scope
Contractor verification
  • Certificate of insurance verified, $1M+ general liability
  • Written scope itemizes diagnosis, prep, materials, and warranty separately
  • Commercial references and local project photos reviewed
  • Workmanship warranty provided in writing
Site logistics and downtime
  • Phasing plan agreed so the business keeps operating during the work
  • Cure and reopening schedule confirmed (standard vs. high-early-strength mix)
  • Night or weekend work scheduled where customer access matters
  • Maintenance plan set: joint resealing and surface sealing on a schedule
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Common questions answered
FAQs
Q
Should I repair or replace my commercial concrete?
It comes down to the base under the slab and how much of the surface is affected. If the subgrade is stable and the damage is localized (roughly under 30 to 40% of the area) with no major vertical displacement, repair is almost always the better value, often 40 to 60% cheaper than replacement. If the base has failed, the slab has settled or heaved unevenly, or past repairs keep failing, replacement is the only fix that lasts. The most expensive mistake is patching a sound-looking slab that is sitting on a failed base, because the same damage returns within a year or two. Get the base assessed before approving either path.
Q
How much does commercial concrete repair cost in San Antonio?
Targeted repairs typically run $4 to 8 per square foot, slab lifting and resurfacing fall around $8 to 14, and full removal and repour runs $10 to 18 depending on thickness, access, and reinforcement. Crack injection is often priced per linear foot ($6 to 14 for structural cracks), and joint resealing is cheaper at $3 to 6 per linear foot. Trip-hazard grinding is usually priced per location, around $200 to 600. The wide ranges reflect how much the diagnosis and base condition drive the real cost. Always get the cause documented and the scope itemized before comparing quotes, because the cheapest patch is rarely the lowest total cost.
Q
Can you repair commercial concrete without closing my business?
In most cases, yes. Commercial concrete work is routinely phased so that only part of a parking lot, walkway, or floor is closed at a time, which keeps the rest of the site open. High-early-strength mixes can bring a repaired or replaced section back to light traffic in 24 to 48 hours instead of the usual 7 days, and night or weekend pours are common for retail, restaurant, and office sites. The key is to build the phasing and reopening schedule into the contract up front, so operations and the crew are working from the same plan.
Q
Why does commercial concrete crack and sink in San Antonio?
The main culprit is Bexar County's expansive clay soil. It swells when wet and shrinks when dry, and that constant movement stresses everything poured on top of it. When the clay shrinks, slabs can settle or crack; when it swells, slabs can heave. Add heavy commercial loads, poor drainage that saturates the subgrade, and intense UV and heat, and you have the perfect conditions for cracking and settlement. This is why base preparation and proper joint spacing matter more here than in most of the country, and why a repair that ignores the base rarely lasts.
Q
Is a sunken or raised sidewalk an ADA liability for my business?
It can be. Under ADA accessibility guidelines, a vertical change in level over 1/4 inch is supposed to be beveled, and a change over 1/2 inch generally requires a ramp rather than an abrupt edge. On a commercial property open to the public, a displaced sidewalk panel is both a trip hazard and a documented accessibility issue, which is exactly the kind of thing that turns into an injury claim. If a walkway has heaved or settled at a joint, treat it as a priority repair. Minor displacement can often be fixed quickly with diamond grinding or slab lifting rather than full replacement.
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Brandon Wyatt

Author: Home Improvement & Roofing Specialist

Brandon Wyatt is a home improvement specialist with extensive experience in residential roofing, storm damage restoration, and exterior home maintenance in San Antonio, Texas.

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