Subfloor Preparation & Repair in Orlando, FL
Professional subfloor preparation and repair in Orlando, FL is the foundation of every successful flooring installation. At Cavalieri Flooring, our expert technicians specialize in comprehensive subfloor prep services including moisture testing, structural assessment, plywood and OSB replacement, concrete crack repair, and precision leveling. A properly prepared subfloor prevents future flooring problems like squeaks, buckling, gaps, and premature wear. Whether you're installing luxury vinyl plank, hardwood, laminate, or carpet, our subfloor preparation services ensure your new floor has a stable, level, and dry foundation that protects your investment.
We handle all subfloor types including wood subfloors (plywood, OSB), concrete slabs, and combination systems. Our thorough assessment identifies moisture issues, structural damage, and leveling needs — often discovered during floor removal — before installation begins.
Why Proper Subfloor Prep Matters
Prevents Floor Failure
Proper prep eliminates the #1 cause of flooring problems: improper substrate conditions.
Moisture Testing
Professional moisture meters and calcium chloride tests detect hidden moisture that can ruin flooring.
Precision Leveling
Floors level to within 3/16" per 10 feet ensure proper installation and long-term performance.
Structural Repairs
We replace damaged plywood, reinforce joists, and repair concrete cracks before installation.
Warranty Protection
Manufacturers require proper subfloor prep to honor flooring warranties.
All Substrates
Wood, concrete, flooring-over-flooring, radiant heat systems—we prep them all expertly.
Common Subfloor Problems in Central Florida Homes
Florida's heat, humidity, and slab-on-grade construction create subfloor conditions you won't find in drier climates. Here are the most common issues our crews find during free estimate inspections — and what they mean for your next flooring project.
Slab Moisture Intrusion
Florida's concrete slabs sit directly on soil with a high water table. Ground moisture wicks up through the slab constantly, and without an adequate vapor barrier, it destroys adhesives, swells wood products, and promotes mold beneath your flooring. Every installation we do includes a calcium chloride or relative humidity (RH) test — if the slab reads above 4.5 lbs MVER, we treat it before anything goes down.
Soft Spots & Termite Damage
Subterranean termites are endemic to Central Florida and they target floor joists and plywood subfloors relentlessly. A soft, spongy area underfoot is often the first sign homeowners notice. Once we pull old flooring, we frequently find damaged plywood that requires section-by-section replacement. Catching this before your new floor goes in is critical — installing over damaged substrate voids manufacturer warranties immediately.
Lippage & Out-of-Flat Concrete
Concrete slabs in older homes often have significant dips, humps, or ridges from settling. Luxury vinyl plank and laminate require a floor that is flat within 3/16 inch over 10 feet — tile requires even tighter tolerances. We use precision straightedges and laser levels to map high and low areas, then apply self-leveling compound or grind high spots to achieve a surface your installer can actually work with.
Squeaky & Bouncy Wood Subfloors
Squeaks happen when plywood panels move against each other or against the joists below — usually because the fasteners have loosened or the wood has swollen and shrunk through humidity cycles. Bounce or flex in a wood subfloor means joist spacing or panel thickness is inadequate for the flooring type going on top. We refasten panels with construction screws (not just nails), add blocking where needed, and overlay with additional plywood if thickness is insufficient.
Subfloor Repair vs. Replacement — What's the Right Call?
Not every subfloor problem requires a full teardown. We give honest assessments — recommending only what's actually needed.
✓ Repair & Level Is Enough When…
- → Surface is structurally solid but uneven
- → Minor cracks or low spots in concrete
- → A few loose screws causing squeaks
- → Moisture is present but within treatable range
- → Damage is isolated to a small section (<20 sqft)
⚠ Replacement Is Needed When…
- → Plywood is visibly rotted or termite-damaged
- → Soft spots cover more than 10–15% of the room
- → Severe mold contamination is present
- → OSB has delaminated from prior water exposure
- → Floor joists are compromised beneath the panels
In many cases, the answer is a combination: patch and level the concrete, replace a damaged plywood section, then seal the whole surface before installation. We quote each scope item line by line so you know exactly what you're paying for and why.
Our Subfloor Prep Process
Comprehensive Inspection
Visual and physical assessment of subfloor condition, structural integrity, and existing damage.
Moisture Testing
Professional-grade moisture meters test wood and concrete for acceptable moisture levels (wood <12%, concrete <4.5 lbs MVER).
Structural Repairs
Replace damaged plywood/OSB, reinforce weak joists, patch concrete cracks, and secure loose boards.
Leveling & Smoothing
Apply self-leveling compound, grind high spots, fill depressions, and create a perfectly flat surface.
Final Verification
Re-check moisture, confirm flatness within tolerance, and approve subfloor for flooring installation.
Subfloor Prep Pricing & Timelines
Subfloor preparation costs depend on the extent of repairs, moisture mitigation needs, and leveling requirements. Here are typical price ranges:
Typical Timeline: 1-3 days depending on scope (leveling compounds require 24-48 hour cure time)
GET FREE ASSESSMENTServing Orlando & Central Florida
- Orlando
- Winter Garden
- Clermont
- Kissimmee
- Lake Nona
- Windermere
- Winter Park
- Apopka
- Ocoee
- Sanford
- Altamonte Springs
Subfloor Types in Orlando Homes — What You're Working With
Most Central Florida homes sit on concrete slabs, but older homes and multi-story buildings may have wood subfloors. Each type requires a different prep approach:
| Subfloor Type | Concrete Slab ★ Most Common FL | Plywood | OSB |
|---|---|---|---|
| Common In | Post-1970 FL homes | Multi-story, older homes | Newer construction post-1990 |
| Florida Moisture Risk | ⚠ High (ground contact) | ✓ Moderate | ⚠ High (swells easily) |
| Required Prep | Self-leveling compound, moisture test | Sanding, shimming, fastening | Sanding, patching, sealing |
| Compatible Flooring | LVP, tile, engineered hardwood | All flooring types | LVP, laminate, carpet |
| Prep Cost (Orlando) | $1–3/sqft | $0.50–2/sqft | $0.75–2.50/sqft |
Florida rule: Always test concrete slabs for moisture before any flooring. Get a free subfloor assessment →
Subfloor Preparation FAQs
Protect Your Flooring Investment
Professional subfloor preparation ensures your new floor performs beautifully for decades.
What Orlando Homeowners Say
★★★★★
4.9 out of 5 ·
182 verified reviews
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"Our concrete slab had a soft, bouncy area near the kitchen. Cavalieri found a void underneath, filled it properly, leveled the surface, and then installed LVP. Feels solid now."
"Water damaged plywood subfloor in the master bath. They replaced just the affected section, moisture tested the repaired area, and installed the new tile. No mold, no shortcuts."
"I was told by another company I needed a full subfloor replacement. Cavalieri used self-leveling compound and leveled 400 sqft for a fraction of the cost. Floor is perfectly flat."
"They put in a vapor barrier over our Florida slab before the engineered hardwood went down. Explained why it was necessary given our moisture test numbers. Smart, knowledgeable team."
"Multiple squeaky spots on the second floor plywood subfloor. Cavalieri secured them all from above with specialty screws that don't show. Quiet as a new build now."
"Cavalieri caught termite damage in our subfloor that nobody else had flagged. They repaired it, treated the area, and documented everything. Thorough doesn't begin to describe it."
