Subfloor installation and preparation
A flawless floor begins with a strong, level foundation
A flawless floor begins with a strong foundation. We specialize in preparing and installing subfloors that ensure stability, levelness, and long-term durability.
Built from the Ground Up
Moisture protection
We install barriers and sealants that prevent future damage.
Perfect leveling
No bumps, no dips — just a smooth, even base ready for installation.
Structural strength
Every subfloor we build supports decades of reliable performance.
The Foundation of Quality
Our preparation process determines the success of every flooring project. We inspect, repair, and prepare your base meticulously to guarantee a perfect installation above it.
Precision Below the Surface
Even though you'll never see it, we treat every subfloor as a masterpiece of precision. Because strong floors start where it matters most.
Every project covers the essentials
- New plywood and OSB subfloor installation
- Self-leveling compound and floor patching for dips and slopes
- Grinding of high spots on wood and concrete subfloors
- Moisture barriers and sealants that prevent future damage
- Screw-down of loose sheathing to eliminate squeaks
- Prep for hardwood, engineered, vinyl, laminate, and tile
Four steps from first call to final walkthrough
Inspect & Measure
We check flatness with a straightedge, test moisture, and locate soft or damaged areas.
Repair
Damaged panels are replaced and loose sheathing is fastened down to the joists.
Level
High spots are ground, low spots are filled, and barriers go in where moisture is a risk.
Ready for Flooring
We verify the base is flat and solid before your new floor goes down.
Need this service?
Tell us about your space and we'll send a clear, no-pressure estimate.
(312) 783-2542- Free, no-pressure estimates
- Local, responsive service
- Clear timelines & communication
Serving Chicagoland & Northwest Indiana
Based in Posen, IL, serving Chicagoland and Northwest Indiana. Not sure if we cover your address? Mention it when you request your free estimate.
The difference a careful job makes
Small choices in prep, materials, and finish work add up to a result that looks better and lasts longer.
Polished Finish
A clean, professional result that elevates the look and feel of the space.
Built to Last
Careful preparation and quality materials help the result hold up over time.
Detail-Driven
We sweat the edges, transitions, and finish work that cheaper jobs skip.
Respect for Time
Clear timelines and steady communication from first contact to walkthrough.
Detail-driven from start to finish
Premium results come from disciplined habits — not shortcuts. Here's the standard we hold ourselves to on every project.
Clear Communication
Straightforward answers, transparent scope, no surprises.
Careful Preparation
Surfaces, materials, and the site are prepped before any real work begins.
Professional Materials
We work with materials chosen for the finish and longevity they deliver.
Respect for Property
Floors, fixtures, and surroundings are protected throughout the project.
Final Quality Check
Every job ends with a walkthrough so the result matches expectations.
Questions, answered
Related services
Luxury Hardwood Floor Installation
Natural beauty, lasting value. Elevate your space with One Star Flooring.
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Prefinished & Engineered Floor Installation
At One Star Flooring, we are expanding our service offerings to include the installation of prefinished and engineered flooring.
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Smart Flooring: Vinyl & Laminate
Vinyl, laminate, and hybrid floors. Elegance, durability, and minimal maintenance.
Learn MoreStart with a Solid Base
Let's prepare the perfect foundation for your dream floors.