Professional Subfloor Leveling and Floor Preparation
Professional subfloor leveling and preparation services to fix uneven floors before new flooring installation.
Tired of These Frustrations?
If any of this sounds familiar, you are in the right place.
Uncertain Quality
Big-box stores and online options make it hard to know if a floor will actually look good and last in your home.
We bring real samples to your home so you choose in your own lighting.
Weeks-Long Timelines
Other contractors string flooring projects out for weeks while your home stays in chaos.
Most installations completed in 3 days, scheduled within a week of signing.
Contractor Horror Stories
Missed deadlines, hidden fees, and sloppy work plague the flooring industry.
Licensed (ROC #336899 & #349964), bonded, and we communicate at every step.
Uneven floors are more than a cosmetic problem — they cause your new flooring to crack, develop gaps, squeak, and wear out years before it should. Zona Floors provides professional subfloor leveling and preparation services that give your new floors the flat, stable foundation they need to perform and last.
Why Subfloor Leveling Matters
Think of the subfloor as the foundation for your flooring. Just as a house needs a level foundation, every flooring material needs a flat, stable substrate:
- Tile cracks over dips and rocks on high spots. Large-format tiles are especially unforgiving — even small deviations cause lippage (one tile edge sitting higher than its neighbor)
- LVP and laminate planks separate at click-lock joints over uneven areas, creating visible gaps that collect dirt and moisture
- Hardwood develops squeaks as boards flex over voids in the subfloor
- Carpet shows every bump and depression through the surface
Flooring manufacturers require the subfloor to meet specific floor flatness tolerances — typically no more than 3/16 inch deviation over a 10-foot span. Installing flooring over a subfloor that exceeds these tolerances voids the material warranty and leads to premature failure. For a deeper look at what goes into this step and why it cannot be skipped, see our article on subfloor leveling and why floor prep matters.
Common Subfloor Issues in Arizona
Arizona homes present specific subfloor challenges:
Concrete Slab Settling
Most Arizona homes are built on concrete slab foundations. Over time, the desert soil beneath the slab can shift, causing the concrete to settle unevenly. This creates dips, high spots, and sometimes hairline cracks across the slab surface. Self-leveling compound is the standard solution for concrete slab unevenness.
Old Adhesive Buildup
When old tile, vinyl, or carpet is removed, the adhesive used to secure it often remains on the subfloor. This dried adhesive creates an uneven surface that prevents new flooring from sitting flat. We remove old adhesive using dust-free grinders and scrapers to restore a clean, flat surface.
Plywood Subfloor Issues
Second-story and some older Arizona homes have plywood subfloors rather than concrete slabs. Plywood can develop waves, squeaks, and soft spots from moisture exposure, age, or poor original installation. We repair damaged sections, screw down loose areas, and install plywood overlay when needed.
Moisture Concerns
While Arizona is dry above ground, slab foundations can absorb moisture from the soil through capillary action. This moisture can interfere with flooring adhesives and damage sensitive materials. We perform moisture testing using calcium chloride (ASTM F1869) or relative humidity probe (ASTM F2170) methods to determine if a moisture barrier is needed before installation.
Leveling Methods
Self-Leveling Compound
Self-leveling compound (SLC) is a cement-based product mixed to a pourable consistency. When poured onto the subfloor, it flows into low spots and self-levels to create a flat surface. SLC is ideal for:
- Concrete slab corrections (dips, settling, minor cracks)
- Preparing for tile, LVP, or hardwood installation
- Covering large areas efficiently
SLC typically cures within 24 hours, and most products can accept flooring installation after 24-48 hours.
Plywood Overlay
For wood subfloors with significant issues, a plywood overlay provides a fresh, flat surface. We install 1/4-inch or 1/2-inch plywood over the existing subfloor, screwing it down in a grid pattern to create a stable platform for new flooring.
Grinding and Scarifying
High spots on concrete can be reduced using floor grinders. We use dust-free grinding equipment with attached vacuums to minimize dust. Grinding is also used to remove old adhesive, paint, and coatings.
Part of a Bigger Project
Subfloor preparation is included with all of our flooring installation projects at no additional charge for standard prep work. For extensive leveling or repair, we provide a detailed estimate. If you are getting new flooring and suspect your subfloor may need work, mention it when you schedule your estimate — we assess the subfloor during every consultation visit.
Call 480-939-0208 or contact us online for a free subfloor assessment.
What's Included
Our Process
Assessment
We inspect your existing subfloor, measure flatness tolerances, and identify the cause of any unevenness.
Remove Old Materials
Existing flooring, old adhesive, staples, and any failed patches are removed to expose the raw subfloor.
Level & Treat
Self-leveling compound, plywood overlay, or grinding is applied to achieve the flatness required for your new flooring.
Test & Verify
Moisture testing and flatness verification confirm the subfloor is ready for installation.
Why Choose Zona Floors
Root Cause Approach
We identify why your floor is uneven — settling, moisture, structural issues, or bad prior work — and address the cause, not just the symptom.
Right Technique
We match the leveling method to your situation: self-leveling compound for concrete, plywood overlay for wood subfloors, or grinding for high spots.
Sets Up Success
Proper subfloor prep prevents cracking, gaps, squeaks, and premature wear in your new flooring — saving you from costly future repairs.
Get Started with a Free Estimate
We bring physical samples to your home, provide a transparent itemized quote, and can schedule your project within a week. No obligation, no hidden fees.
Our Guarantee
Beat-or-Match Any Price
We guarantee to beat or match any competitor's quote for the same scope of work.
Recent Projects
What Our Customers Say
Abraham/Zona Floors were amazing! They were quick in solving my flooring issue. They were prompt, courteous and so very professional. They had to tear up old flooring and re-lay new flooring. They were meticulous in ensuring the sub-floor was perfect before laying the new floor. It was a pleasure to work with them. I wouldn't use anyone else!
Joan H.
Verified Google Review
For years, we would come home to broken and bowing tile in our house. Our house has a crawl space with an uneven subfloor. We hummed and hawed over how to take on such a massive project ourselves; taking up the tile on our first floor, dealing with the concrete backer, and tile underneath cabinets. Zona Floors came in and quickly impressed us with their professionalism and care for our unique house. Taking an imperfect situation, problem solving issues we had, and making a piece of art as the finished product. We love our new floors and highly recommend this company!
Troy L.
Verified Google Review
700 SF job. LVT in our casita. Tom came to our home, wrote up the job and gave us an attractive quote — including a solution for radius stairs that stumped other installers. We accepted the quote 2 weeks later, selected a flooring pattern and grade — Republic vinyl plank — paid 50% with order and scheduled the job. Abraham was our installer. 3-day job including stairs and baseboards. Excellent work. Attention to detail. Very pleased with their work.
Gary, N. Scottsdale
Verified Google Review
Frequently Asked Questions
01 Why is subfloor leveling important?
02 What causes uneven floors?
03 What is self-leveling compound?
04 How much does subfloor leveling cost?
05 Can I see the subfloor before deciding on new flooring?
Related Services
Ready to Get Started?
Schedule your free in-home estimate. We bring samples, give you a transparent quote, and can start within a week.