Two choices shape a hardwood floor more than any others: how the boards are built, and which wood they’re made from. Get those two right for the room, and the rest (color, plank width, finish) comes down to taste.
Solid hardwood
Each board is a single piece of wood, usually three-quarters of an inch thick. Its biggest strength is lifespan. A solid floor can be sanded and refinished many times, so a worn floor can look new again decades later.
Solid hardwood belongs at or above ground level, nailed to a wood subfloor. It isn’t made for basements or for going straight onto a concrete slab, because it moves too much with moisture.
Engineered hardwood
Engineered boards have a top layer of real hardwood, called the wear layer, bonded to a core of plywood or similar material. The core layers run in different directions, so the board resists swelling and shrinking far better than solid wood.
That stability makes engineered hardwood the right choice for basements, concrete slabs, and rooms where humidity swings. Depending on the product, it can be nailed, glued, or floated over a pad.
The wear layer decides how long it lasts
Check the wear layer on the product spec sheet, not the total board thickness. It tells you how many times the floor can be sanded. These are typical industry estimates, and the condition of the floor decides the real number.
| Wear layer | Sanding and refinishing |
|---|---|
| About 1 mm | Not sandable. The finish can be recoated only |
| About 2 mm | 1 to 2 times |
| About 3 mm | 2 to 3 times |
| 4 mm or more | 3 to 4 times |
Solid and engineered side by side
| Solid | Engineered | |
|---|---|---|
| Construction | One piece of wood | Hardwood wear layer on a layered core |
| Refinishing | Many times | Depends on the wear layer |
| Basements and concrete slabs | No | Yes |
| Stability when humidity changes | Moves more | Moves less |
| Typical installation | Nailed to a wood subfloor | Nailed, glued, or floated |
Choosing a wood species
Hardness is measured with the Janka test: the force needed to press a steel ball halfway into the wood. A higher number means the wood resists dents better. For everyday scratches, though, the finish and its sheen matter more than the species.
| Species | Janka hardness | What it’s like |
|---|---|---|
| Red oak | 1,290 | The classic. Strong grain and a warm tone that can lean slightly pink. Takes stain evenly |
| White oak | 1,360 | Tighter grain and a cooler, more neutral tone. A favorite for natural, light, and gray looks |
| Hard maple | 1,450 | Smooth and pale with quiet grain. Dark stains can look blotchy on it |
| Hickory | 1,820 | Very hard, with big color changes from board to board. Reads rustic |
| American walnut | 1,010 | Naturally rich and dark. Softer, so it dents more easily |
| American cherry | 950 | Warm and reddish, and it darkens noticeably in sunlight. Soft |
What about laminate and luxury vinyl plank?
Neither one is wood. Laminate is a printed wood image over a fiberboard core, and luxury vinyl plank is vinyl. Both resist scratches better than hardwood, luxury vinyl plank also stands up well to water, and neither one can be sanded. Our guide on hardwood, laminate, or luxury vinyl plank compares them room by room.
Three questions that settle it
- Is the room below ground or on a concrete slab? Choose engineered hardwood, or luxury vinyl plank if water is a real risk.
- How long will you stay? If you want a floor you can refinish for decades, choose solid hardwood or engineered with a thick wear layer.
- Kids, big dogs, or heavy traffic? Lean toward a harder species, a lower sheen, and a light or mid-tone color that hides wear.
Want an answer for your own rooms? A free written estimate covers which floor fits each space and what the installation will cost.