Engineered Wood vs Solid Wood Flooring: UK Comparison
Engineered wood has a real wood top layer bonded to a plywood base. Solid wood is one piece of hardwood, top to bottom. Engineered is more stable and works over underfloor heating; solid wood lasts longer and can be sanded more times.
Engineered wood: £25-70 per m², more stable (doesn't cup or bow with humidity), compatible with underfloor heating, can be sanded 1-4 times depending on wear layer thickness. Solid wood: £40-120 per m², lasts 50-100+ years, can be sanded 5-7 times, but moves with humidity (gaps in winter, tightening in summer) and isn't recommended over underfloor heating.
Key differences
| Feature | Engineered | Solid |
|---|---|---|
| Construction | Wood veneer wear layer on plywood/HDF base | One piece of hardwood, full thickness |
| Stability | High, cross-ply base resists movement | Lower, moves seasonally with humidity |
| Underfloor heating | Compatible if under 18mm total thickness | Not recommended, heat causes gaps |
| Installation | Float, glue or secret-nail | Nail or glue only |
| Times can sand | 1-4, depends on wear layer | 5-7, full board thickness available |
| Lifespan | 20-40 years | 50-100+ years |
| Cost per m² | £25-70 | £40-120 |
Neither is objectively "better". Engineered wins on stability, heating compatibility and upfront cost; solid wins on total lifespan and how many times you can bring a tired-looking floor back to new. Which matters more depends on your subfloor, your heating system and how long you plan to stay in the house.
Subfloor and humidity: why it matters
Solid wood is a single piece of timber, so it expands and contracts across its width as ambient humidity changes through the year. In a typical UK home, that means slightly tighter boards in a damp winter and small gaps opening up in a dry, heated summer, or vice versa depending on your heating pattern. Over a suspended timber floor with decent ventilation underneath, this movement is usually manageable. Over solid concrete, especially on a new-build ground floor slab that's still releasing residual moisture, solid wood is more prone to cupping (edges lifting relative to the centre of each board).
Engineered wood's cross-ply base, where each layer of plywood runs at right angles to the one below it, largely cancels out that movement. This is the main reason it's the default recommendation for ground floors and concrete subfloors in the UK.
Underfloor heating: the deciding factor for many buyers
If you have or plan to install underfloor heating, this decision mostly makes itself. Engineered wood, provided total board thickness stays at 18mm or under and the specific product confirms UFH compatibility, handles the heat cycling without issue. Solid wood is not recommended over UFH: the repeated heating and cooling accelerates the wood's natural expansion and contraction, and over a few heating seasons this typically shows up as visible gaps between boards. See our wet underfloor heating guide and electric underfloor heating guide for system-specific detail.
Sanding and lifespan in practice
Solid wood's big advantage is how many times you can restore it. Sanding removes roughly 0.5-1mm of wood per pass, and a full-thickness solid board (18-20mm) can typically take 5-7 sandings over its life, spread across many decades and often multiple owners.
Engineered wood's wear layer caps how many times it can go under the sander. A 3mm wear layer, the most common thickness sold in the UK, allows for roughly 1-2 sandings; a 4-6mm premium wear layer stretches to 2-4. Budget engineered wood with a wear layer under 2mm often can't be sanded at all and is essentially disposable once the surface finish wears through.
In practice, most engineered wood floors are replaced rather than repeatedly refinished, since the cost of a full sand-and-refinish job on a 20-30m² area often isn't far off the cost of a new floor, particularly for budget products.
Noise and feel underfoot
Solid wood, being denser and fixed more rigidly (typically nailed or glued rather than floating), tends to feel and sound slightly more solid underfoot, with less of the faint hollow resonance you can get from a floated engineered floor over a soft underlay. This is a minor point for most households but matters more in flats, where footfall noise transmission to the room below can be a genuine consideration; a floated engineered floor with an acoustic underlay usually performs better here than solid wood nailed to battens.
When to choose engineered wood
- Ground floors over concrete, where humidity and moisture movement are a concern
- Over underfloor heating, wet or electric
- Flats, where floating installation is often required by the lease and acoustic underlay helps with noise
- Budget under roughly £60 per m² for materials
- New builds, where the concrete slab may still be releasing moisture in the first year or two
When to choose solid wood
- Period or listed homes, where an authentic solid material suits the property
- A genuinely long-term investment, planning to stay 20+ years and wanting the option to refinish repeatedly
- Upstairs rooms with reasonably stable humidity and a suspended timber subfloor
- Wanting the maximum possible number of future refinishes, useful if you expect heavy wear from a large family or pets
Cost comparison for a 20m² living room
Engineered oak (3mm wear layer), floating installation: roughly £700 materials + £200 fitting = £900 total.
Solid oak (18-20mm), secret-nailed or glued: roughly £1,200 materials + £400 fitting = £1,600 total.
The gap narrows over a long ownership period once you factor in solid wood's extra refinishing capacity, but for most people moving house within 10-15 years, engineered wood's lower upfront cost and easier installation make it the more sensible default, reserving solid wood for period properties or a genuine forever home.