Concrete Slab Installation
Jacksonville FL — Vapor
Barriers Done Right
Shed foundations, garage floors, workshop slabs, and equipment pads — engineered with proper vapor barrier placement and moisture testing that Jacksonville’s high water table demands. Most slab moisture failures we assess trace back to one missing step: a vapor barrier that was skipped or installed incorrectly.
Licensed Florida Contractor, DBPR · Direct employees, no subcontractors · Since 2017
What Is a Concrete Slab?
A concrete slab is a flat, poured concrete foundation used as a standalone floor or base — for a shed, garage, workshop, generator, or storage building — rather than an exterior walking or driving surface. Unlike a driveway or patio, a slab that will have flooring, stored goods, or equipment placed directly on it requires a vapor barrier and often moisture testing before use, which is why Jacksonville’s high water table makes slab specification meaningfully different from exterior concrete work.
What Does a Concrete Slab Cost in Jacksonville FL?
Concrete slabs cost $5-$9 per square foot installed in 2026 — generally less than driveways or patios since slabs typically skip decorative finishing, but the vapor barrier and thickness spec vary significantly by intended use.
| Slab Type | Typical Size | 2026 Jacksonville Price |
|---|---|---|
| Shed Foundation Slab | 10×12 ft (120 sq ft) | $600 – $1,080 |
| Standard Garage Floor Slab | 20×20 ft (400 sq ft) | $2,400 – $3,600 |
| Workshop / Man-Cave Slab | 24×30 ft (720 sq ft) | $4,320 – $6,480 |
| Generator / HVAC Equipment Pad | 4×6 ft (24 sq ft) | $300 – $500 (minimum charge applies) |
| Heavy Equipment / RV Storage Slab | 30×40 ft (1,200 sq ft), 6″ thickness | $9,600 – $14,400 |
| Vapor Barrier Upgrade (10-mil+) | Per sq ft additional | +$0.30 – $0.60/sq ft |
| ASTM F2170 Moisture Testing | Per test location, post-cure | $150 – $400 per test |
The 5 Types of Concrete Slabs We Pour in Jacksonville
Each slab type has a distinct thickness, reinforcement, and vapor barrier specification based on its load and moisture-sensitivity requirements.
1. Shed Foundation Slab
4″ thickness, light broom finish, standard 6-mil vapor barrier. The most common residential slab request in Jacksonville.
2. Garage Floor Slab
4-5″ thickness, often monolithic with the driveway apron, 10-mil vapor barrier recommended given vehicle fluid exposure.
3. Workshop / Flex-Space Slab
5″ thickness, 15-mil vapor barrier if flooring will be installed over it — moisture testing strongly recommended before flooring goes down.
4. Equipment / Generator Pad
4-6″ thickness depending on equipment weight, often no vapor barrier needed for uncovered outdoor equipment.
5. Heavy-Duty Storage Slab
6″ thickness, #4 rebar, engineered for RV, boat, or commercial vehicle static loads.
What Is a Vapor Barrier and Why Does It Matter?
This single specification determines whether flooring, stored belongings, and equipment on your slab stay dry for decades — or fail within a few years.
💧 Why Vapor Barriers Matter in Jacksonville Specifically
Jacksonville’s sandy soil sits over a high water table, and groundwater vapor migrates upward through untreated soil and concrete over time. Without a vapor barrier, this moisture passes through the slab and into anything placed on top — flooring adhesive fails, stored cardboard boxes wick moisture, and workshop equipment can corrode from below.
📋 The Standard: ACI 302.1R and 6-mil Minimum
The American Concrete Institute’s ACI 302.1R guidance recommends a vapor retarder/barrier beneath any slab that will have moisture-sensitive flooring or use above it. A 6-mil polyethylene sheet is the baseline; we specify 10-15 mil for garage floors and workshop slabs given greater puncture risk during construction and heavier long-term use.
⚠️ What Happens When It’s Skipped
A slab poured directly on soil without a vapor barrier will pass moisture indefinitely — there’s no way to retrofit a vapor barrier under a cured slab. The only corrections after the fact are surface-applied moisture mitigation coatings, which cost more than the original barrier would have and don’t perform as well.
Jacksonville’s High Water Table and Your Slab
This is the underlying reason vapor barriers matter so much more in Jacksonville than in many other parts of the country — and why “just pour it like everywhere else” advice from out-of-state contractors or DIY guides can lead you wrong here.
Jacksonville sits atop the Floridan Aquifer system, one of the most productive groundwater aquifers in the United States, and much of Duval County’s native soil is sandy and highly permeable. This combination means the water table sits relatively close to the surface across large portions of the city — often within a few feet of grade in low-lying areas near the St. Johns River, the Intracoastal Waterway, and numerous tidal creeks that thread through neighborhoods like San Marco, Ortega, and the Southbank. Even properties that aren’t visibly near water can sit on soil where groundwater rises seasonally, particularly during Jacksonville’s wet season from June through September when rainfall regularly exceeds 6-8 inches per month.
What this means practically: water vapor is almost always present in the soil beneath any Jacksonville slab, and that vapor doesn’t stay put. It migrates upward through capillary action and diffusion, passing through untreated concrete the same way moisture moves through a coffee filter — slowly, but continuously, over years and decades. In drier climates with a deeper water table, contractors sometimes get away with skipping vapor barriers because there simply isn’t enough moisture pressure from below to cause problems. That’s not the case here. A slab poured without a vapor barrier in Jacksonville isn’t taking a small risk — it’s building on an assumption that doesn’t hold in this specific geography.
This is also why we don’t treat vapor barrier specification as an upsell or an optional add-on during estimates. It’s a response to a documented regional condition, not a sales tactic — and it’s the same reason the termite pre-treatment vapor barrier requirement discussed above exists under Florida Building Code in the first place. Florida’s building code writers designed these requirements around exactly this soil and water table reality, not as generic national boilerplate.
What Moisture Testing Standards Do We Follow?
If you’re installing flooring over a new or existing slab, moisture testing isn’t optional — most flooring manufacturer warranties require documented proof the slab is dry enough.
| Test Method | What It Measures | Best For |
|---|---|---|
| ASTM F2170 (In-Situ RH Probe) | Internal relative humidity via drilled probe holes — the most accurate method | Any flooring installation, especially wood, vinyl, or coatings with strict RH limits |
| ASTM F1869 (Calcium Chloride) | Surface moisture vapor emission rate (MVER) | Older method, still accepted by some flooring manufacturers; surface-only reading |
| ASTM D4263 (Plastic Sheet) | Qualitative visual check for surface moisture presence | Quick preliminary check, not a substitute for quantitative testing before major flooring investment |
ASTM F2170 requires a minimum of three test holes for the first 1,000 sq ft, with one additional hole per additional 1,000 sq ft. Test holes are drilled to 40% of slab depth for a standard slab-on-grade drying from one side. We coordinate this testing before flooring installation on any slab where it’s requested.
Florida Termite Pre-Treatment Requirements Before Your Slab Is Poured
This is a legal requirement most homeowners never hear about until it’s mentioned on a permit — and it directly interacts with your slab’s vapor barrier.
📋 The Legal Requirement: Florida Building Code §1816 / R318
Florida law requires termite pre-treatment for any structure with a foundation, precisely because Florida has more invasive termite species established than any other U.S. state — including the Formosan subterranean termite, an aggressive species where a single colony can number in the millions. Treatment must be applied to the compacted soil before the slab is poured, and a licensed pest control company must issue a Certificate of Compliance to the building department.
💧 Why This Directly Affects Your Vapor Barrier Spec
Per Florida Building Code R318.1.4, chemically treated soil must be protected with a minimum 6-mil vapor barrier to prevent rainfall dilution of the termiticide before the slab is poured — if rain occurs before the vapor barrier is placed, the soil treatment must be redone. This means your vapor barrier isn’t just a moisture-control measure; on a termiticide-treated slab, it’s also a legal requirement protecting the pest treatment itself.
🔧 Treatment Application & Rate
Termiticide is typically applied at a rate of roughly 1 gallon per 10 square feet to the soil beneath the slab, with higher concentrations (about 4 gallons per 10 linear feet) around critical areas like expansion joints and utility penetrations. Any soil disturbed after initial treatment — including for a plumbing change — must be retreated before the pour, per Section 1816.1.2.
⚠️ Who Coordinates This — And Why It Matters for Your Timeline
Termite pre-treatment is performed by a licensed pest control company (regulated separately by the Florida Department of Agriculture and Consumer Services), not by your concrete contractor directly — but it must happen after excavation/grading and immediately before the pour. We coordinate this timing with your chosen pest control provider as part of scheduling your slab project, since a missed or improperly timed treatment can delay your pour.
Source: Florida Building Code, Section 1816 (Residential Code R318); Florida Department of Agriculture and Consumer Services, Pest Control Division.
What Are the Signs of a Slab Moisture Problem?
Moisture issues in a slab are often invisible until something built on top of it fails. Here’s what to watch for.
💧 1. Musty Odor in a Garage, Workshop, or Shed (Health Risk)
A persistent musty smell despite ventilation often indicates ongoing moisture migration through the slab — a precursor to the mold/microbial growth ASTM F2170 specifically warns can result from excessive slab moisture.
🪵 2. Flooring Cupping, Bubbling, or Delamination (Financial Risk)
Wood flooring cupping at the edges, vinyl bubbling, or adhesive failure are classic signs of moisture vapor emission exceeding the flooring’s tolerance — often traced back to a missing or punctured vapor barrier.
📦 3. Damage to Stored Cardboard, Wood, or Fabric
Items stored directly on an unprotected slab that show unexplained dampness, staining, or mildew are absorbing ground moisture wicking up through the concrete.
🧱 4. White Powdery Residue (Efflorescence)
A white, chalky mineral deposit on the slab surface is efflorescence — visible evidence that water is moving through the concrete and depositing dissolved salts as it evaporates.
🔬 5. Failed Moisture Test Before Flooring Installation
If an ASTM F2170 test returns a relative humidity reading above your flooring manufacturer’s specified threshold (commonly 75-80% RH for many products), installation should be paused — proceeding anyway is the single most common cause of early flooring failure and warranty denial.
A Real Jaxterra Concrete Slab Quote — Start to Finish
A composite example based on a typical Arlington workshop slab project.
| 4″ limerock base, #3 rebar, 3,500 PSI, 5″ slab | $3,120 |
| 15-mil vapor barrier (flooring planned) | $240 |
| ASTM F2170 moisture testing at 28 days (2 locations) | $300 |
| Total Installed Price | $3,660 |
Moisture testing confirmed the slab was within the flooring manufacturer’s 75% RH threshold at day 28, and vinyl plank flooring was installed the following week without incident.
What Determines How Long Your Slab Lasts?
Two slabs poured the same week, in the same neighborhood, can have very different service lives depending on these six variables.
1. Subgrade Compaction Quality
A slab poured on inadequately compacted fill will settle unevenly over years, cracking regardless of the concrete mix quality above it. This is the single biggest lifespan variable and the one most invisible to a homeowner at time of pour.
2. Vapor Barrier Integrity
Punctures during rebar/mesh placement or concrete pour are common and easy to miss — even a small tear defeats the barrier’s purpose over the slab’s life. We inspect for punctures immediately before pouring.
3. Concrete Mix Design and PSI
3,500 PSI is our minimum; slabs bearing heavier static loads (RV, equipment) use 4,000 PSI mixes. Under-specifying PSI for the actual load shortens service life regardless of everything else being correct.
4. Curing Method and Duration
Concrete that cures too quickly in Jacksonville’s heat develops surface micro-cracking that compromises long-term durability. Curing compound applied immediately after finishing protects against this.
5. Load Matching to Intended Use
A slab specified for shed storage but later used for a car lift or heavy machinery will fail prematurely — thickness and reinforcement must match actual, not initially planned, use.
6. Ongoing Moisture Exposure After Construction
A slab with a correct vapor barrier can still develop moisture issues if exterior grading changes direct water toward the structure after construction — periodic drainage checks around the slab perimeter protect the original investment.
3 Real Jacksonville Concrete Slab Failure Patterns
Anonymized, composite patterns based on repeated assessments across Jacksonville properties.
Pattern 1: The Skipped Barrier
A homeowner poured a shed slab through a handyman who skipped the vapor barrier to save on materials. Two years later, stored tools and cardboard boxes showed consistent moisture damage. No fix was possible short of demolition and repour — the barrier can’t be retrofitted.
Pattern 2: The Undersized Garage Floor
A garage floor slab specified for passenger vehicles later needed to support a car lift. The 4″ slab with mesh reinforcement wasn’t rated for the point-loads, and cracking developed around the lift’s footing pads within a year of installation.
Pattern 3: The Untested Flooring Failure
A workshop slab had vinyl plank flooring installed without moisture testing. Within 6 months, sections began bubbling — subsequent ASTM F2170 testing confirmed relative humidity well above the flooring manufacturer’s threshold, a $150-400 test that would have prevented a full flooring tear-out and reinstall.
How Thick Should a Concrete Slab Be?
Thickness is determined by the load the slab will bear, not a one-size-fits-all default.
| Use Case | Recommended Thickness | Reinforcement |
|---|---|---|
| Shed / light storage | 4 inches | 6×6 W1.4 welded wire mesh |
| Garage floor (passenger vehicles) | 4-5 inches | #3 rebar, 18″ centers |
| Workshop / flex-space | 5 inches | #3 rebar, 18″ centers |
| Generator / HVAC pad | 4-6 inches (per manufacturer spec) | #3 rebar or mesh, per equipment weight |
| RV / heavy equipment storage | 6 inches | #4 rebar, 16″ centers |
What Are the Benefits of a Properly Engineered Slab?
A slab is infrastructure for whatever sits on top of it — get the fundamentals right and everything built on it lasts longer.
Protects Stored Belongings
A properly vapor-barriered slab keeps moisture from wicking into stored items, cardboard, or wood — a real, practical benefit for shed and garage use.
Protects Flooring Investment
Documented moisture testing before flooring installation prevents warranty disputes and costly adhesive failures down the line.
Correct Load Rating for Equipment
Matching slab thickness to actual equipment weight (generator, RV, workshop machinery) prevents settling and cracking under load.
Adds Functional Property Value
A properly built shed, garage, or workshop foundation extends usable property function — storage, hobby space, or income-generating workshop use.
Long Service Life
A correctly built slab with proper base and vapor barrier lasts the lifetime of the structure built on it — 25+ years with no moisture-related failures.
Documentation for Future Buyers
Written specification and moisture test records provide useful documentation if you sell the property and a buyer’s inspector asks about the structure’s foundation.
What Does a Concrete Slab Cost Over Its Full Lifetime?
Unlike exterior concrete, a properly built slab has very low ongoing costs — the investment is almost entirely upfront.
| Cost Type | Frequency | Lifetime Total (400 sq ft garage slab) |
|---|---|---|
| Initial installation (standard spec) | One-time | $2,400 – $3,600 |
| Termite pre-treatment (if new construction) | One-time, before pour | $400 – $800 (via pest control company) |
| Moisture testing before flooring | One-time, if flooring planned | $300 – $800 |
| Ongoing maintenance | Minimal — occasional cleaning/sealing | $0 – $200/year if sealed |
| Expected service life | N/A | 25+ years with no major recurring cost |
The takeaway: A concrete slab’s total cost of ownership is dominated by the upfront installation — correct vapor barrier and thickness specification at the start eliminates almost all future cost, unlike exterior concrete that requires periodic resealing.
When Is the Best Time to Pour a Slab in Jacksonville?
Slabs follow the same seasonal logic as other concrete projects, with one added consideration: coordinating termite pre-treatment timing around weather.
| Month(s) | Conditions | Rating | Slab-Specific Note |
|---|---|---|---|
| Jan-Feb | Cool, low humidity, no thunderstorm window | Ideal | Best window to coordinate termite treatment + vapor barrier placement without rain-delay risk |
| Mar-May | Warming, humidity climbing | Excellent | Still favorable for coordinated pest/concrete scheduling |
| Jun-Sep | 89-94°F, afternoon thunderstorms | Manageable | Termite treatment timing is tighter — rain before vapor barrier placement requires retreatment |
| Oct-Dec | Transitioning to cool, storms declining | Very Good | Reliable window for the full termite-treat-to-pour sequence |
Common Concrete Slab Sizes in Jacksonville FL
Use this table to estimate your project against the pricing above.
| Structure | Typical Size | Sq Ft | Est. Cost Range |
|---|---|---|---|
| Small storage shed | 8×10 ft | 80 sq ft | $400 – $720 |
| Standard shed | 10×12 ft | 120 sq ft | $600 – $1,080 |
| One-car garage floor | 12×20 ft | 240 sq ft | $1,440 – $2,160 |
| Two-car garage floor | 20×20 ft | 400 sq ft | $2,400 – $3,600 |
| Workshop / flex building | 24×30 ft | 720 sq ft | $4,320 – $6,480 |
| RV/boat storage pad | 14×40 ft | 560 sq ft, 6″ thick | $4,480 – $6,720 |
What Factors Affect Concrete Slab Cost in Jacksonville?
🔴 Factors That Increase Cost
- Higher-mil vapor barrier for flooring-ready slabs
- ASTM F2170 moisture testing (multiple locations)
- 6″ thickness for heavy equipment/RV loads
- #4 rebar instead of standard #3 or mesh
- Difficult site access for equipment/trucks
- Existing structure or old slab demolition
- Small slab size (fixed mobilization costs spread thin)
🟢 Factors That Reduce Cost
- Standard 6-mil vapor barrier (light-use slabs)
- No flooring planned — skip moisture testing
- 4″ thickness for shed/light storage use
- Standard 6×6 mesh reinforcement
- Easy, clear site access
- New construction — no demolition
- Larger slab (fixed costs spread over more sq ft)
What Happens Financially If You Skip the Vapor Barrier?
A vapor barrier costs pennies per square foot at installation. Skipping it doesn’t save money — it defers the cost and adds interest.
🏚️ 1. Flooring Failure and Replacement
Moisture wicking through an unprotected slab causes adhesive failure, cupping, and delamination in wood or vinyl flooring — a full flooring replacement can cost 5-10x what the original vapor barrier would have cost.
📦 2. Damage to Stored Belongings
Cardboard boxes, wood furniture, paper documents, and fabric stored directly on an unprotected slab absorb ground moisture over time — a slow, often unnoticed loss until items are damaged beyond use.
🦠 3. Mold and Microbial Growth
Per ASTM F2170’s own stated rationale, excessive slab moisture after flooring installation can cause “microbial growth” — a health and remediation cost that can run into thousands of dollars, far exceeding the original vapor barrier investment.
🔧 4. No Retrofit Option Once Cured
There is no way to install a vapor barrier under a slab after it’s poured and cured. The only corrections are surface-applied moisture mitigation systems, which are more expensive than the original barrier and don’t perform as well as a properly placed sub-slab barrier.
Why Jacksonville Property Owners Trust Jaxterra With Slab Work
A slab is invisible once whatever’s built on it goes up. Trust comes down to whether the vapor barrier and base prep were actually done.
Vapor Barrier Spec in Every Written Quote
Mil thickness and placement documented before the pour — not an assumption you have to catch.
ASTM-Standard Moisture Testing Available
F2170 in-situ RH testing coordinated before flooring installation whenever requested.
Licensed Florida Contractor, DBPR
Direct employees only — no subcontractors — eliminating lien risk under Florida Chapter 713.
Thickness Matched to Actual Load
We ask what’s going on the slab before quoting — a generator pad and an RV storage slab are specified differently.
10-15% Deposit Cap
Compliant with Florida Statute 489.126 — full payment only after you inspect and approve completed work.
Since 2017 in Northeast Florida
Years of experience with Jacksonville’s high water table and sandy subgrade conditions specific to slab work.
Concrete Slab vs. Pier-and-Beam Foundation — Which Is Right?
For sheds, garages, and workshops, slab-on-grade is the default choice in Jacksonville — but it’s worth understanding the alternative.
| Factor | Slab-on-Grade | Pier-and-Beam |
|---|---|---|
| Installed cost | $5-$9/sq ft | $12-$20/sq ft (more labor-intensive) |
| Moisture management | Requires vapor barrier beneath slab | Elevated structure, natural ventilation underneath |
| Flood/high-water-table tolerance | Fixed elevation — no adjustment after pour | Can be elevated above grade for flood-prone lots |
| Best for | Sheds, garages, workshops on stable, well-drained lots | Flood-prone areas or sites with poor soil bearing capacity |
| Jacksonville suitability | Suitable for the vast majority of residential lots | Considered for specific flood-zone properties |
Our honest take: Slab-on-grade is the right choice for the overwhelming majority of Jacksonville sheds, garages, and workshops. Pier-and-beam is worth discussing only if your specific lot sits in a known flood zone or has documented poor soil bearing capacity — we’ll flag this during the on-site assessment if it applies to you.
How Jaxterra Compares to a Typical Slab Contractor
| What to Check | Typical Contractor | Jaxterra Concrete Contractors |
|---|---|---|
| Vapor barrier spec in writing | Rarely disclosed or discussed | Mil thickness specified on every quote |
| Moisture testing before flooring | Not offered or mentioned | ASTM F2170 testing available and recommended |
| Thickness matched to actual use | Default 4″ regardless of load | Confirmed use case before quoting thickness |
| Documentation for future buyers | Verbal only | Written spec and test records provided |
Can I Pour My Own Concrete Slab, or Do I Need a Professional?
Small slabs are among the more DIY-feasible concrete projects — but the vapor barrier step is the one place shortcuts cost the most later.
✅ Reasonable DIY Scope
A small shed foundation slab (under 150 sq ft) with no flooring plans and no equipment weight concerns is achievable for an experienced DIYer with proper compaction equipment and a correctly placed vapor barrier.
⚠️ Get the Vapor Barrier Right or Hire Out
If you’re DIYing a slab that will have flooring or long-term stored goods on it, at minimum use 6-mil poly, overlap seams by 12 inches, and tape seams — cutting corners here is the single most common DIY slab mistake.
🚫 Requires a Professional
Any slab requiring a permit, moisture testing coordination, or heavy equipment load rating (RV, workshop machinery, generator per manufacturer spec) should go through a licensed contractor.
How Jaxterra Pours a Concrete Slab in Jacksonville FL
Builds on our standard 9-step installation process, with vapor barrier placement added as a distinct step.
Assessment & Use-Case Confirmation
We ask what’s going on the slab — this determines thickness, reinforcement, and vapor barrier spec before we quote.
Excavation & Subgrade Prep
Excavate to design depth, remove organic material, compact native subgrade.
Compacted Limerock Base
Minimum 4″ limerock base, compacted to 95% Modified Proctor density.
Vapor Barrier Placement
Poly sheeting placed per ACI 302.1R guidance, seams overlapped 12″ and taped, punctures patched before pour.
Forms, Rebar & Pour
Forms set, rebar or mesh placed per load spec, 3,500+ PSI concrete poured and finished.
Cure, Optional Moisture Testing & Handoff
28-day cure; ASTM F2170 testing coordinated if flooring installation is planned, before handoff.
Tools and Materials on Every Jaxterra Slab Project
6-15 Mil Poly Vapor Barrier
Thickness matched to slab use — 6-mil for sheds, 10-15 mil for garage and workshop floors.
Plate Compactor
Compacts limerock base to 95% Modified Proctor density before vapor barrier placement.
ASTM F2170 RH Probes
In-situ relative humidity testing equipment for pre-flooring moisture verification.
Slump Cone (ASTM C143)
Tests concrete consistency on every truck delivery.
Laser Distance Meter
Measures exact slab dimensions on-site for accurate written quotes.
Bull Float & Darby
Standard finishing tools for a flat, level slab surface.
Concrete Slab Installation Across Jacksonville FL
Mandarin / Southside
Common requests: workshop slabs and shed foundations on larger residential lots.
Northside / Baldwin
Heavy-duty RV and equipment storage slabs given acreage properties in these areas.
Nocatee / St. Johns
Garage floor slabs for new construction, often coordinated with builder timelines.
Riverside / Avondale
Smaller shed and equipment pad slabs on older, more compact residential lots.
Orange Park / Fleming Island
Generator pad slabs, frequently requested alongside hurricane preparedness upgrades.
Arlington
Workshop and flex-space slabs, often with moisture testing requested before flooring.
Concrete Slab Terms Explained
Vapor Barrier
A polyethylene sheet placed under a slab to block groundwater vapor migration into the concrete and anything placed above it.
Relative Humidity (RH) Testing
ASTM F2170 method measuring internal slab moisture via drilled probe holes, the industry standard before flooring installation.
Moisture Vapor Emission Rate (MVER)
Surface-level moisture measurement per ASTM F1869, using the calcium chloride method.
Mil Thickness
The thickness unit for vapor barrier sheeting — 1 mil equals 1/1000 inch. 6-15 mil is standard residential range.
Slab-on-Grade
A concrete slab poured directly on prepared subgrade, as opposed to an elevated or pier-supported foundation.
Modified Proctor Density
A compaction benchmark (95% is standard) confirming the limerock base can bear the design load.
Concrete Slab Questions Homeowners Actually Ask
Explore Our Other Jacksonville Concrete Services
Where This Page’s Data Comes From
- ACI 302.1R — American Concrete Institute guidance on vapor retarders/barriers beneath slabs
- ASTM F2170 — Standard Test Method for In-Situ Relative Humidity in Concrete Slabs
- ASTM F1869 — Standard Test Method for Moisture Vapor Emission Rate (calcium chloride)
- ASTM D4263 — Standard Test Method for Indicating Moisture (plastic sheet method)
- ASTM C143 — Standard slump testing method
- Florida Statute 489.126 — contractor deposit law
- Florida Statutes Chapter 713 — Construction Lien Law
Get Your Free Concrete Slab Estimate — Jacksonville FL
We assess your intended use, specify the correct vapor barrier and thickness, and deliver a written quote within 24 hours.