What are signs that my subfloor needs repair?

Key warning signs include: squeaky or bouncy floors when walked on; visible soft or spongy spots; existing flooring that has buckled, separated, or developed high and low spots; water stains or discoloration indicating past moisture intrusion; and musty odors suggesting mold in the subfloor assembly. Our installers assess all of these during the estimate visit.

How much does subfloor replacement cost in Orlando?

Full plywood subfloor replacement in Orlando typically costs $3–$8 per square foot including materials and labor. Partial repairs of damaged sections run $150–$600 for small areas up to 40 sqft. Concrete subfloor patching and leveling costs $1–$3 per square foot. The exact cost depends on the extent of damage, subfloor material, and accessibility. Cavalieri Flooring provides free written estimates that include a subfloor assessment.

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.

Plywood subfloor preparation and repair in Orlando, FL

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

New plywood subfloor after replacement in Winter Garden, FL

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:

Basic Inspection & Testing $150 - $300

Plywood/OSB Replacement $3 - $5/sq ft

Self-Leveling Compound $2 - $4/sq ft

Concrete Crack Repair $200 - $500

Typical Timeline: 1-3 days depending on scope (leveling compounds require 24-48 hour cure time)

GET FREE ASSESSMENT

Serving Orlando & Central Florida

Orlando
Winter Garden
Clermont
Kissimmee
Lake Nona
Windermere
Winter Park
Apopka
Ocoee
Sanford
Altamonte Springs

View All Service Areas →

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

How much does subfloor repair cost in Orlando?+

Full plywood subfloor replacement typically costs $3–$8/sqft including labor. Partial repairs run $150–$600 for small areas. Concrete leveling costs $1–$3/sqft. The exact cost depends on damage extent, subfloor material, and accessibility. Cavalieri Flooring includes a written estimate with every free assessment visit.

Do I need to fix my subfloor before installing new flooring?+

Yes. Most flooring manufacturers require the subfloor to be flat within 3/16" over 10 feet. Soft spots, squeaks, damaged areas, and high-moisture sections must also be addressed. Skipping subfloor prep is the most common cause of flooring failures, voids warranties, and creates expensive problems after installation.

What are the signs that my subfloor needs repair?+

Key signs include: squeaky or bouncy floors when walked on; visible soft or spongy spots; existing flooring that has buckled or separated; water stains indicating past moisture intrusion; and musty odors suggesting mold in the subfloor assembly. Our installers assess all of these during the free estimate visit.

How long does subfloor prep and repair take?+

Minor subfloor prep (leveling compound, patching) takes 1–2 days including cure time. Full subfloor replacement over a large area can take 2–4 days. Moisture issues requiring treatment and drying may extend the timeline. Your installer provides a project-specific timeline during the estimate.

Can new flooring be installed directly over old flooring without prep?+

Sometimes — but only if the existing floor is solid, flat, firmly attached, and free of moisture damage. Any unevenness in the old floor telegraphs through to the new surface. Cavalieri Flooring installers assess each situation individually and tell you honestly what is needed.

What is the difference between a subfloor and underlayment?+

The subfloor is the structural layer (concrete, plywood, or OSB) attached to the floor joists or slab. Underlayment is a thin layer (foam, cork, felt) installed between the subfloor and finished flooring to add cushioning and sound dampening. Underlayment cannot substitute for proper subfloor leveling and repair — it must be completed first.

How much does full subfloor replacement cost in Orlando?+

Full plywood subfloor replacement runs $3–$8/sqft including materials and labor. Partial repairs of damaged sections (up to 40 sqft) typically run $150–$600. Concrete subfloor patching and leveling is $1–$3/sqft. Exact pricing depends on extent of damage and accessibility. Free written estimates include all subfloor assessment findings.

What causes subfloor damage in Central Florida homes?+

Most common causes: (1) Moisture intrusion from plumbing leaks or high slab moisture — Florida's humidity makes this the leading cause; (2) Termite damage — Florida's warm climate makes wood subfloor joists highly vulnerable; (3) Age-related wear in homes built before 1980; (4) Improper prior flooring installation that allowed water infiltration. Annual inspections and prompt plumbing repairs are the best prevention.

Can new flooring be installed directly over a failing subfloor?+

No — installing over a soft, rotted, or bouncy subfloor is the most common cause of early flooring failure and voided warranties. Click-lock LVP and laminate require a flat, firm substrate within 3/16 inch per 10-foot span. Hardwood requires a structurally sound subfloor free of movement. Tile requires no flex whatsoever. Cavalieri always inspects and repairs the subfloor before any flooring goes down — shortcuts here cost far more in the long run.

Protect Your Flooring Investment

Professional subfloor preparation ensures your new floor performs beautifully for decades.

SCHEDULE INSPECTION CALL: (321) 424-0546

What Orlando Homeowners Say

★★★★★ 4.9 out of 5 · 182 verified reviews
See all reviews →

★★★★★

"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."

Y. Clark

Verified Google Review · Orlando

★★★★★

"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."

Z. Rodriguez

Verified Google Review · Pine Hills

★★★★★

"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."

A. Lewis

Verified Google Review · College Park

★★★★★

"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."

B. Lee

Verified Google Review · Edgewood

★★★★★

"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."

C. Walker

Verified Google Review · Casselberry

★★★★★

"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."

D. Hall

Verified Google Review · Goldenrod