Subfloor Repair & Leveling
Your Floors Are Only as Good as What's Beneath Them
Soft spots, squeaks, uneven surfaces, and moisture damage in the subfloor cause hardwood, LVP, and laminate floors to fail — regardless of how good the top product is. Ramos Wood Floors inspects and repairs subfloors before every installation to ensure your new floors perform as they should for years to come.
We repair delaminated OSB, replace rotted plywood, level uneven surfaces, and secure loose panels — creating a stable, flat base that meets manufacturer installation requirements.
What's Included
Everything Covered in This Service
Subfloor Inspection
Moisture readings, flatness check, and structural assessment across the entire installation area.
Moisture Testing
We check for elevated moisture levels that could cause the new floor to cup, buckle, or delaminate.
Panel Replacement
Delaminated, rotted, or severely damaged plywood or OSB panels are replaced with matching thickness material.
Leveling
Low spots filled with leveling compound; high spots sanded or ground flush.
Fastening
Loose panels are renailed or screwed to joists to eliminate movement and squeaks.
2-Year Guarantee
All subfloor repair work is covered by our 2-year workmanship guarantee.
How It Works
Our Step-by-Step Process
Inspection
We walk the subfloor, test for soft spots, measure flatness, and identify moisture issues.
Moisture Remediation
If elevated moisture is detected, we identify the source and treat or allow proper drying before proceeding.
Panel Replacement
Damaged sections are cut out and replaced with structurally sound plywood or OSB of matching thickness.
Leveling
Self-leveling compound is poured into low spots; high spots are ground flush with a belt sander.
Fastening & Squeak Elimination
All panels are fastened firmly to joists. Screws are used in problem areas where nails have pulled.
Final Flatness Check
We verify the subfloor meets the 3/16" over 10-foot flatness standard before any flooring is installed.
Materials & Products
What We Use on Every Project
Subfloor repairs use 3/4" tongue-and-groove plywood or 7/16"–3/4" OSB to match the existing substrate thickness. Leveling compound is Henry 547 or Mapei Ultraplan for fast-cure flat areas. Fastening uses ring-shank nails or construction screws driven to joist locations.
Common Problems We Fix
Floor Issues We Solve
Moisture-Damaged Subfloor
Rotted or delaminated panels replaced after moisture source is resolved.
Uneven or Sloped Surface
Self-leveling compound brings low areas up; sanding brings high spots down.
Squeaky Subfloor
Loose panels refastened to joists eliminate squeaking before the finish floor is installed.
Soft or Spongy Spots
Delaminated OSB or rotted plywood replaced with new structural panels.
High Spots Under LVP or Laminate
LVP and laminate require a flat subfloor — we grind or compound to meet specs.
FAQ
Frequently Asked Questions
Related Services
Other Services You May Need
Service Areas
We Come to You Across the Rockford Region
Serving homeowners and businesses in Winnebago, Boone, and Ogle counties.
Free Estimate
Get Your Free, No-Obligation Estimate
Tell us about your project and we'll get back to you within 24 hours with honest pricing and a plan. No pressure, no surprises.
- Free in-home estimate — no obligation
- 2-year workmanship guarantee
- Licensed & fully insured in Illinois
- 13+ years of hands-on experience
- Owner Harnol Ramos on every job
- Serving all Rockford-area communities
Or call/text us directly:
(917) 957-0253