Choose engineered hardwood for basements, floors over concrete and rooms with in-floor heating, and choose solid hardwood for main living areas where you want to sand and refinish many times. Wear-layer thickness decides how often an engineered floor can be restored. Engineered usually costs less to prepare and install in tricky spots, while solid pays back through a longer refinishing life.
TL;DR:
- A 1 mm veneer should be recoated only, while about 3 mm allows professional sanding and 6 mm supports refinishing cycles similar to solid wood.
- Before installing over concrete, test slab moisture against the flooring maker’s limit and check flatness, then choose a suitable vapor barrier or adhesive.
- Material prices place entry level engineered flooring at the low end and solid hardwood at the high end, but leveling, adhesive, and labor can shift project totals.
- For kitchens and entrances, weigh moisture exposure and consider resilient flooring; on damp slabs, wavy subfloors, or with unknown veneer thickness, consult a flooring professional.
- Maintain indoor humidity within the manufacturer’s stated range, clean with a lightly damp mop and a cleaner made for wood, and wipe spills promptly.
Table of Contents
- How do engineered and solid hardwood compare at a glance?
- What are engineered and solid hardwood made of, and why does the wear layer matter?
- How do they handle moisture, concrete, basements and radiant heat?
- What does installation and subfloor preparation involve?
- How do refinishing and maintenance work over the life of the floor?
- How do species, plank width and finish change the look?
- What do engineered and solid hardwood cost over time?
- What is the quick room-by-room checklist?
- A contractor's view from our own job sites
- Get flooring done right inside a larger renovation
- FAQ
- Sources
How do engineered and solid hardwood compare at a glance?
Here is the quick version, matched to what most homeowners care about:
- Construction: engineered is a real-wood veneer over a multi-ply core. Solid is one piece of hardwood from top to bottom.
- Best rooms: engineered suits basements, slabs and radiant heat. Solid suits main floors, bedrooms and living areas over a wood subfloor.
- Refinishing: engineered depends on its wear layer, from recoat only to several professional sandings. Solid can be sanded many times.
- Moisture stability: engineered handles humidity swings better. Solid moves more with the seasons.
- Price band: engineered spans entry-level to premium. Solid sits at the higher end for materials, with refinishing value later.
- Installation: engineered can be nailed, glued or floated. Solid is traditionally nailed to a wood subfloor.
Best for busy readers: wet or below-grade spaces, pick engineered. Traditional rooms where you plan decades of refinishing, pick solid.
What are engineered and solid hardwood made of, and why does the wear layer matter?
Engineered flooring is a layer of real wood veneer glued over two or more laminations of plywood, which is why it is more dimensionally stable than solid. Each extra lamination, with grain running in alternating directions, resists expanding and shrinking a bit more. Solid hardwood is a single piece of timber, so it moves as one block when humidity changes.
Both count as genuine wood. The National Wood Flooring Association says both are real wood when the top layer is genuine hardwood, and it advises you to look at wear-layer thickness first when judging an engineered floor's durability, because that layer sets how often it can be restored.
Practical thresholds from professional refinishing guidance:
- A 1mm wear layer should only be recoated.
- About 3mm is the practical minimum for professional sanding.
- At 6mm, an engineered floor behaves much like solid for refinishing cycles.
Ask for the wear-layer measurement in millimetres, not just the total plank thickness. A thick plank can still hide a thin veneer.
How do they handle moisture, concrete, basements and radiant heat?
Humidity is where the two types part ways. Because of its cross-laminated core, engineered flooring holds its shape through seasonal swings better, which is why it is typically recommended over concrete, in basements and over radiant heat. Solid wood reacts more strongly. If indoor relative humidity (RH) drifts too far, you can see cupping in damp months and gaps in dry ones, so keep your home's RH in the range the manufacturer specifies.
Concrete deserves its own plan:
- Test the slab's moisture before anything goes down, and compare the result to the flooring maker's RH limit.
- Use a vapour barrier or an adhesive rated for the measured moisture level.
- If the slab is a moisture concern, lean toward engineered.
Skipping the test is a classic mistake. Practitioners point to missing moisture tests and poor flatness as primary causes of warranty-voiding failures such as cupping or delamination, often inside the first year. For a deeper look at what moisture does after installation, this guide on measuring moisture first and fixing hardwood buckling is a useful companion.
Over in-floor heating, a stable multi-ply core is generally the safer pick.
What does installation and subfloor preparation involve?
How the floor is held down depends on the product and the subfloor:
- Nail or staple: the traditional route for solid hardwood, and for thicker engineered planks, over a wood subfloor.
- Glue-down: the usual choice over concrete, using an adhesive matched to the slab's moisture reading.
- Floating: many engineered products click or glue together at the edges and rest on an underlay, which is handy when you cannot fasten into the subfloor.
Flatness matters as much as the fastening method. Many slabs are not flat to industry tolerances, and self-levelling compound is often needed before planks go down. Humps and dips telegraph through the floor as squeaks, hollow spots and stressed joints. If you are unsure when levelling is worth it, this note on when to level before laying flooring gives practical thresholds.
Moisture testing is not optional. Skipping it commonly voids the warranty, and it is the step most likely to save you a failed floor. If you are also thinking about noise between storeys, our checks in soundproofing between floors cover underlay and subfloor choices.
How do refinishing and maintenance work over the life of the floor?
Wear-layer thickness drives everything here. A thin veneer floor can usually only be recoated, which refreshes the finish but cannot remove deep scratches or change the stain. A thicker wear layer allows professional sanding, and solid hardwood can be sanded repeatedly across its lifetime.
Typical triggers for refinishing are dull traffic lanes, finish worn through to bare wood, and scratches that have outgrown a touch-up. Catch dullness early and a recoat may be all you need. Refinishing costs vary by region and by how much sanding is involved, so get a written quote for your room sizes.
Routine care is simple and makes a real difference:
- Keep indoor RH in the range your flooring maker recommends.
- Clean with a lightly damp mop and a wood-safe cleaner, never a soaking one.
- Wipe up spills right away.
- Put felt pads under furniture and use mats at entrances to cut down on scratches.
How do species, plank width and finish change the look?
The surface you see on engineered flooring is the same species of real wood as solid, so oak is oak either way. What changes the look is how the planks are cut and finished. Wider planks show more grain and read as more luxurious, while narrow planks give a classic, busier pattern. Longer planks make a room feel calmer because there are fewer end joints.
In most homes, a good engineered floor is visually indistinguishable from solid once installed. The difference shows up in very long solid planks and in a few species or cuts that are harder to find as veneer.
For matching across rooms, keep the species and finish consistent, and check how the new floor meets existing trim and thresholds. If you are blending with an older floor, bring a sample to compare in your own light before you commit.
What do engineered and solid hardwood cost over time?
Think in broad price bands: entry-level engineered at the lower end, mid-range engineered in the middle, and solid hardwood at the top for materials. Exact prices change by species, grade and supplier, so use quotes for your own project.
Upfront price is only part of the story. Subfloor preparation, self-levelling compound, adhesive and labour can shift the total more than the plank itself. Over the long run, refinishing cycles matter too. Solid hardwood can be sanded many times, and a thick-wear engineered floor can offer a similar benefit.
The best advice is to spend where it protects you: choose a thicker wear layer if you want multiple refinishes, and pay for proper preparation. A cheaper floor laid on a wet or uneven slab is the expensive mistake, because early replacement erases any savings.
What is the quick room-by-room checklist?
Run through these before you order:
- Basement or below grade: avoid solid. Choose engineered, and test the slab first.
- Kitchen and entrance: weigh moisture exposure carefully, and consider resilient alternatives. Our contractor comparison of LVP vs laminate covers that decision.
- Radiant heat: choose engineered with a stable core.
- Large open-plan main floor: choose solid, or engineered with a thick wear layer if you want several sandings.
- Any slab: moisture test and flatness check before you buy.
When your situation is borderline, such as a damp slab, a wavy subfloor or an unknown wear layer, call a pro before you commit.
A contractor's view from our own job sites
I see the same pattern on retrofits: people pick the plank first and ask about the subfloor last. Before any hardwood goes down, I check slab moisture, flatness and the wear-layer spec, and I would rather delay a day than install on a questionable base. On retrofits, we choose flooring and prepare the surface based on site conditions. If you want a second set of eyes during a renovation, contact us for a site assessment.
— Cory
Get flooring done right inside a larger renovation
Flooring goes better when the choice, subfloor prep, installation and finishing are managed together. As part of our full-home renovations and additions, we handle flooring selection and installation alongside the rest of the project. You can see how we manage scope, budget and trades on our renovation process page, then reach out when you are ready to talk about your home.
FAQ
What are the downsides of engineered wood flooring?
The main limit is the wear layer. A thin veneer may only be recoated, so deep damage can mean replacing planks. Quality and thickness vary widely between products, so check the wear-layer measurement before buying.
Is engineered hardwood real wood?
Yes. The National Wood Flooring Association says both solid and engineered are real wood when the top layer is genuine hardwood. The difference is how the plank is built underneath.
Which is better over concrete or in a basement?
Engineered is usually the better choice there, because its layered core is more stable and it offers more installation options. Test the slab's moisture first, and use a barrier or adhesive suited to the result.
Can you refinish engineered hardwood?
It depends on the wear layer. A 1mm layer should only be recoated, while about 3mm allows professional sanding. Thicker layers behave more like solid hardwood.