Real wood flooring comes in three constructions: solid, engineered, and composite engineered. Everything else in a showroom describes something other than the material — parquet is a pattern, reclaimed is a source, prefinished is a finishing method. Bamboo, cork, laminate and LVP aren’t wood at all.
Sort those apart and the showroom stops being confusing.
Key takeaways
- Only three constructions are real wood. The NWFA classifies them separately from styles like plank, strip and parquet.
- Solid ¾” hardwood refinishes 4–6 times. Engineered depends on one number: the wear layer. The NWFA says don’t sand below 2.5 mm.
- Red oak’s Janka score of 1290 is the benchmark. Hickory is 1820. Cherry is 950.
- Reclaimed and parquet aren’t separate materials — they describe where the wood came from and how it’s laid.
- Keep indoor humidity at 30–50% RH. This matters more than which species you choose.
Quick comparison
| Type | Real wood? | Price | Refinishable? | Best for |
| Solid hardwood | Yes, throughout | $$$ | 4–6 times | Above-grade rooms you’ll keep for decades |
| Engineered | Yes, on the surface | $$–$$$ | 0–5×, depends on wear layer | Slabs, wide planks, humidity swings |
| Composite engineered | Surface only | $$ | Usually 0–1 | Real wood in moisture-prone rooms |
| Reclaimed | Yes | $$$$ | Yes, if solid | Character and historic interiors |
| Parquet | Usually | $$$–$$$$ | Yes, if solid | Entryways, dining rooms |
| Prefinished | Yes | $$–$$$ | Yes | Renovations you’re living through |
| Bamboo | No — a grass | $–$$ | Rarely | Modern, renewable-minded builds |
| Cork | No — tree bark | $–$$ | Sometimes | Bedrooms, offices, quiet rooms |
| Laminate | No — printed | $ | Never | Budget, rentals, high traffic |
| LVP / SPC | No — vinyl | $ | Never | Kitchens, baths, basements |
1. Solid hardwood
One piece of timber, top to bottom, usually ¾” thick.
A ¾” plank has about ¼ inch of usable wood above the tongue. A full refinish removes roughly 0.8 mm; a heavy correction takes about 1.6 mm. That’s four to six refinishes — at 15–20 years between them, a floor that outlives you. That’s the whole argument for solid: it’s the only flooring you can keep resurfacing.
The limitation is moisture. Solid boards move more than engineered ones because nothing restrains them. The NWFA notes that a swing from 30% to 60% RH moves wood enough to visibly affect the floor, and width amplifies it — a 5″ plank moves more than twice as much as a 2¼” strip. That’s why solid belongs at or above grade, not over a slab that emits vapor upward.
2. Engineered wood
Real hardwood veneer over a cross-directional core. The perpendicular layers cancel each other’s movement, so it holds through seasonal swings that would gap solid wood. It’s the standard answer for concrete slabs, wide planks and radiant heat.
Ignore total thickness. The wear layer is the spec. A 12 mm plank with a 0.6 mm veneer is disposable; the same plank with 4 mm will outlive most solid floors.
| Wear layer | What you get | Lifespan |
| Under 2 mm | No sanding ever — recoat only | 15–25 yrs |
| 2 mm | At the NWFA threshold. One light pass at best | 25–35 yrs |
| 3 mm | 1–2 refinishes. The quality sweet spot | 30–50 yrs |
| 4–6 mm | 2–4 refinishes. Effectively solid-wood territory | 50–80 yrs |
The NWFA’s guidelines state it flatly: below 3/32″ (2.5 mm), don’t sand.
To check a floor you own, pull a floor register and measure the solid band above the layered core. To check before buying, ask for the millimeter figure in writing — not “premium,” the number.
One caveat: hand-scraped and wire-brushed textures are cut into the wear layer. Sand them and you erase what you paid for.
3. Composite engineered
Real hardwood over a core that isn’t wood plies — HDF, MDF, magnesium oxide or rigid SPC. The point is water resistance: an SPC-backed plank with an oak veneer can go where a plywood core shouldn’t.
The trade-offs are concrete. Veneers are almost always thin, so refinishing is off the table. MDF and HDF cores still swell if water reaches a cut edge. And because composite cores use adhesives, check for TSCA Title VI / CARB Phase 2 compliance. Treat it as a 20–25 year product, not a permanent one.
4. Reclaimed wood
A source category, not a construction — salvaged barn, factory and warehouse timber, remilled into solid or engineered flooring.
Old-growth lumber grew slowly, so it’s denser than the same species today. Reclaimed heart pine measures around 1,225 Janka against 380–870 for modern pine.
Three tiers:
- Rustic reclaimed keeps everything — nail holes, saw marks, weathered patina, color variation between boards.
- Clean reclaimed is the same lumber milled past the weathered face, giving old-growth density with a refined, contemporary surface.
- Reclaimed heart pine is its own market. Longleaf pine from pre-1900 structures is effectively unavailable as new lumber.
Because board dimensions vary more than new flooring, confirm the supplier has metal-detected and kiln-dried the stock.
5. Parquet
A pattern, not a material — herringbone, chevron, basketweave, Versailles. The boards can be solid or engineered. A herringbone floor and a straight-lay floor can come from the identical box.
Herringbone uses square-cut boards laid at 90°. Chevron uses boards mitered at 45° so the points meet in a continuous V — a different product, cut specifically for the pattern.
Patterns compete with furniture, so parquet reads best in smaller defined spaces: entryways, dining rooms, hallways.
6. Prefinished vs site-finished
A finishing method, not a construction — both solid and engineered come either way.
Prefinished ships with a factory UV-cured, aluminum-oxide finish. That’s the most abrasion-resistant finish available, and it can’t be replicated on site. The trade-off is micro-beveled seams between boards, and damage means replacing the board rather than spot-repairing it.
Site-finished floors are sanded and finished in place, giving a seamless surface with no bevels, any stain color you want, and the ability to spot-repair. The finish will be less abrasion-resistant than factory UV-cured.
The wood-look alternatives
Bamboo is a grass, and the label hides three different products. Horizontal and vertical bamboo sits near 1,380 Janka; strand-woven runs 3,000–5,000, harder than nearly any hardwood. Carbonizing for color softens it by 20–30%. So “bamboo is hard” and “bamboo dents” are both true — ask which construction and what the score is. Check emissions compliance on imports.
Cork is harvested bark from the cork oak, which regrows every 9–12 years without felling the tree. Roughly half air, so it’s warm, quiet and comfortable to stand on. It dents under sustained point loads and fades in direct sun.
Laminate is a printed image under melamine resin over an HDF core. Not refinishable, ever. The spec that matters is the AC rating: AC3 minimum for residential, AC4 for kitchens and busy households. Excellent scratch resistance, but the core swells if water reaches a seam.
LVP and SPC are genuinely waterproof, which is why they own kitchens and basements. But the wear layer is a clear vinyl film — scratch through it and the plank can only be replaced. It doesn’t develop patina the way wood does.
Choosing a species: the Janka scale
Janka measures the force needed to embed a steel ball halfway into a sample. Red oak’s 1290 is the industry benchmark.
| Species | Janka | What it means |
| Eastern white pine | 380 | Will dent — in a farmhouse floor, that’s the point |
| Douglas fir | 660 | Soft. Period-accurate installs |
| American cherry | 950 | Choose for color, not traffic |
| Black walnut | 1010 | Same trade-off. Richest domestic brown |
| Heart pine (old growth) | 1225 | Reclaimed only |
| Red oak | 1290 | The benchmark. Pink undertone |
| White oak | 1360 | Harder, tighter grain, neutral tone |
| Hard maple | 1450 | Hard and clean — but blotches with dark stain |
| Hickory | 1820 | Hardest common domestic. Dramatic variation |
| Brazilian cherry | 2350 | Exotic. Very hard, darkens with UV |
Source: NWFA and USDA Forest Products Laboratory.
Three things Janka doesn’t tell you. It describes the surface species only — a 2 mm hickory veneer isn’t “1820-hard” as a system. Grain variation hides damage better than hardness prevents it, so with dogs, texture buys you more than 200 Janka points. And almost every “scratch” is in the finish, not the wood.
Quick notes: white oak has displaced red oak in current design because its neutral tone suits light and gray finishes. Hickory varies from near-white to deep brown within the same box — see a full layout before ordering. Maple blotches badly with dark stain; keep it natural. Walnut lightens with UV while cherry ambers deeply in the first year, so move rugs around early.
Strip, plank and wide plank
These describe format, not species or construction.
| Format | Width | Notes |
| Strip | Under 3″ | Traditional. Most stable, most visible lines |
| Plank | 3″–5″ | The residential standard |
| Wide plank | 5″–12″+ | Fewer seams, more grain per board, most movement |
The NWFA’s figure again: a 5″ plank moves more than twice as much as a 2 1⁄4″ strip under the same humidity change. That’s why very wide formats are overwhelmingly engineered.
Why humidity matters more than species
More wood floors fail from indoor climate than from anything else, and it’s the reason the three constructions behave differently in the first place.
The NWFA target is 30–50% relative humidity and 60–80°F, year-round. In that range wood sits at 6–9% moisture content, which is where it’s manufactured to live.
Too dry in winter and boards shrink, opening gaps. Too humid and they swell, cup at the edges, and eventually buckle. Engineered and composite cores resist this; solid wood doesn’t.
How to choose your type
1. Where is it going? Above grade: solid or engineered both work. Slab or below grade: engineered. Kitchen or bath: composite engineered, LVP or tile.
2. Will it get wet? No wood floor is waterproof. If standing water is likely rather than accidental, stop trying to make wood work.
3. Do you want to refinish it later? Yes means solid ¾”, or engineered at 3 mm+.
4. How hard is your household on floors? Dogs and kids mean texture, grain variation and a character grade over raw Janka score. Wire-brushed white oak hides more than smooth dark walnut.
5. Can you control humidity? If your house swings 20% to 65% and you won’t fix that, choose engineered and narrower boards.
Solid vs engineered: which is better?
Neither. They solve different problems.
Solid if you’re above grade, can hold 30–50% RH, want boards under 6″, and value resurfacing the floor four or five more times.
Engineered if you’re on a slab, want wide planks, are over radiant heat, or your climate swings hard. At a 3 mm+ wear layer you give up very little.
Both have real wood on the surface. Both look identical.
FAQ
How many types of wood flooring are there?
Three real-wood constructions: solid, engineered and composite engineered. Reclaimed describes the source and parquet the pattern, while bamboo, cork, laminate and LVP are wood-look alternatives.
Is engineered hardwood real wood?
Yes — the visible surface is genuine hardwood. The difference is the cross-directional core beneath, which resists seasonal movement.
How many times can a wood floor be refinished?
A ¾” solid floor: four to six. Engineered depends on wear layer — under 2 mm, none; 3 mm, one to two; 4–6 mm, two to four. Each pass removes about 0.8 mm, and the NWFA says not to sand below 2.5 mm.
Which wood flooring is best for a basement?
Engineered, after slab moisture testing. If there’s any history of water intrusion, use LVP or SPC — that’s the correct product, not a compromise.
What’s the most durable wood flooring?
Depends what you mean. Longest lifespan: solid, because you can keep refinishing it. Most dent resistance: hickory at 1820. Most stable: engineered. Most water resistant: LVP.
What’s best for pets?
Forgiveness over hardness. Wire-brushed white oak in a character grade with a satin finish hides claw marks far better than a smooth dark floor of any species.
Is laminate wood flooring?
No — it’s a printed photograph under resin over an HDF core, and it can’t be refinished. Check the AC rating: AC3 minimum, AC4 for kitchens.
Is bamboo wood?
No, it’s grass. Hardness varies enormously — horizontal bamboo near 1,380 Janka, strand-woven 3,000–5,000.
Is cork real wood?
No. Cork is harvested bark from the cork oak, not lumber. It’s softer and warmer than hardwood and absorbs sound well.
Is reclaimed wood the same as hardwood?
Reclaimed describes where the lumber came from, not its species or construction. Old-growth reclaimed stock is usually denser than the same species harvested new.
Is parquet a type of hardwood?
No, it’s a pattern. Herringbone and chevron can both be made from solid or engineered wood.
What humidity should I keep my house at?
30–50% RH and 60–80°F year-round, per NWFA guidelines. This prevents more floor problems than any purchasing decision.
