Many homes in the Valley are built on concrete slabs, and that changes how a hardwood floor needs to be installed. Wood and concrete do not naturally get along. Concrete holds and transmits moisture, wood moves with moisture, and if the two are not separated and prepared properly, the result can be cupping, gaps, or failing boards.

The good news is that when it is done right, solid and engineered hardwood perform beautifully over a slab. Here is what a professional installation actually involves, step by step, so you know what to expect from the first day to the final coat.

Step 1: Demolition and Removal of Existing Flooring

Every project starts by removing what is already there, whether that is carpet, ceramic tile, or another type of flooring. Carpet comes up relatively quickly. Tile and other hard flooring require special tools and considerably more time, so removal of those materials is typically quoted separately. All debris is hauled away from your site.

This phase matters for another reason: it is when we see the slab itself for the first time.

Step 2: Slab Inspection and Preparation

Once the old flooring is gone, we often discover hidden issues in the concrete that could not be seen before, such as cracks, uneven areas, high spots, or leftover adhesive and residue. These must be resolved before we can install a subfloor or new hardwood. Skipping this step is one of the most common reasons floors fail early.

If your slab needs work, our team handles it as part of our concrete slab preparation services, so one crew is responsible from the foundation to the final coat.

Step 3: Moisture Barrier and Plywood Subfloor

Once the slab is ready, a moisture barrier goes down first. On top of it, 4′ by 8′ sheets of CDX plywood are fastened directly into the slab. This plywood layer becomes your floor’s foundation. It gives the hardwood a stable, nailable surface and helps buffer it from the concrete.

If the existing subfloor is already plywood, as on second levels, we use an Aquabar moisture-protection layer or an adhesive with built-in moisture protection in addition to nails.

Step 4: Acclimation

Wood needs to adjust to the conditions in your home before it is installed. Planks should be delivered and allowed to acclimate to the room’s temperature and humidity so they do not shrink or swell after installation. This is especially important in Arizona’s dry climate. Your installer will tell you how long your specific product needs.

Step 5: Installing the Planks

With the subfloor ready and the wood acclimated, installation begins by snapping a chalk “true line” to guide the first row. From there, solid planks are blind nailed so no nail heads show on the surface. Layout, working across rooms and around transitions, is where craftsmanship shows.

If your design calls for something special, such as wide planks, custom borders, or inlays, this is the stage where those details come together.

Step 6: Finishing

How the floor is finished depends on which type you choose:

  • Solid hardwood is usually unfinished when installed and then sanded and finished on site. This allows for fully custom stain colors and a smooth, continuous surface.
  • Engineered hardwood is typically prefinished at the factory, so there are no on-site finishing steps and the project moves faster.

Solid or Engineered Over a Slab?

Both can work, and the best choice depends on your goals.

Engineered hardwood is built in layers, with a real wood top layer over a stable core. It installs faster, comes in thicknesses from about 3/8″ to 3/4″, and can be more affordable than solid. In a dry climate, attention to installation details is especially important. Learn more on our engineered hardwood page.

Solid hardwood offers the most customization and can be refinished many times over its life, making it a long-term investment. With a properly prepared subfloor, it performs very well in our area.

For a full walkthrough of what each project phase looks like, see our New Hardwood Floor Installations page.

Backed by Warranties

Solid floors from Mission Hardwood come with a lifetime structural warranty, as do most of our engineered products, and our adhesives carry lifetime warranties as well. Ask us about the details for your specific floor.

Frequently Asked Questions

Can hardwood be installed directly on concrete?

Not without proper preparation. Concrete holds moisture, so a moisture barrier and an appropriate subfloor system are essential for long-term performance. How the floor is attached depends on the product and the condition of your slab.

Do I need to remove my existing tile first?

In most cases, yes. Tile is typically removed so the slab can be inspected and prepared. Because tile removal requires special tools and time, it is usually quoted separately from carpet removal. We can look at your floors and tell you what is practical for your home.

What if my slab has cracks or uneven spots?

That is common, especially in older homes. Cracks and low or high spots need to be addressed before a subfloor or hardwood goes in, since they can transfer to the finished floor. We evaluate the slab once old flooring is removed and resolve issues as part of the project.

How long does the whole project take?

It varies with square footage, the type of existing flooring, the condition of the slab, and whether you choose solid or engineered. Solid floors take longer because they are finished on site, while prefinished engineered floors move faster. We will give you a clear timeline for your home during your estimate.

Can you do baseboards and floor leveling too?

Yes. In addition to flooring, we offer related services such as baseboard installation, floor leveling, and subfloor installation, so one team can handle the whole job.

What if I have a second-story room?

Upper floors usually have a plywood subfloor rather than a concrete slab. In that case, we use a moisture-protection layer or an adhesive with moisture protection in addition to nails. Your installer will recommend the right method for your floor system.

What should I do if I notice problems later, like cupping or gaps?

Contact us. Moisture and seasonal humidity changes can affect wood, and early attention makes repairs simpler. Our team also handles hardwood floor repairs and can match your existing species and finish.

Ready to Plan Your New Floor?

Since 1972, Mission Hardwood Floor Co. has installed approximately 20,000 floors across the greater Phoenix area, and we know which products and methods hold up in Arizona. Visit our showroom at 8350 E Evans Rd, Suite A1, Scottsdale, AZ 85260 (Monday to Friday, 9am to 6pm), call (480) 994-0123, or email frontdesk@MissionHardwood.com. We install throughout Phoenix and Scottsdale and across the Valley. Explore all of our services.