“Solid or engineered?” is often asked as if one were simply better than the other. It is not. Each construction suits a different set of site conditions, and the wrong choice for the site causes problems that no finish or grade can fix. This guide sets out the project conditions that decide the question, so the construction can be specified before the first sample is made.
The three constructions in brief
At Vu Uy we make three constructions, all in French White Oak:
- Solid hardwood. One piece of oak through the full thickness, with no core. It has the greatest refinishing allowance of the three constructions.
- 2-layer engineered. A sawn oak wear layer bonded to a stable plywood core. This is our main engineered construction.
- 3-layer engineered. An oak wear layer over a cross-layered core with a backing layer, designed for greater dimensional stability.
The two engineered constructions differ from each other as much as they differ from solid. For that comparison, see 2-layer vs 3-layer engineered oak. Here, the question is when to use oak all the way through and when to use an oak face on an engineered core.
Start with five project conditions
The right construction comes out of the site, not the catalog. Before comparing prices, collect answers to these five questions.
1. What is the subfloor?
The subfloor sets the installation methods available, and the installation method narrows the constructions. A wood subfloor and a concrete slab lead to different conversations with the installer. Engineered boards, with their cross-grained cores, are generally the more adaptable choice across different subfloors, while solid boards are more demanding about the conditions they are laid over. The installer’s assessment of the subfloor should come before the construction is fixed.
2. How wide are the boards?
Wood moves across its grain as indoor humidity changes, and a wider board has more wood across the grain to move. That is why solid oak is best suited to narrower boards, while 3-layer engineered is well suited to wider boards and larger open areas where dimensional stability matters.
Our current production widths run from 3-1/4” (83mm) to 9-1/4” (235mm), and widths from 3” (76mm) to 12” (305mm) can be made to order. If the design calls for the wide end of that range, the construction question becomes more important, not less.
3. How much floor height is available?
In new construction there is often room to choose. In renovation there usually is not: the new floor has to meet existing doors, stair nosings, cabinets and adjoining rooms. 2-layer engineered is a practical choice where overall floor height is limited.
Overall thickness is available from 3/8” (10mm) to 13/16” (21mm). Our standard builds are 5/8” (15mm) and 3/4” (20mm); other thicknesses are made to order.
4. How will the floor be installed?
Installation method follows from the subfloor and from local practice, and it should be agreed with the installer before the order. It affects the choice of construction and, for pattern work, the choice of profile. Our standard profile is Tongue & Groove on all four sides, with square edge available on request. The NWFA publishes installation guidance that installers widely reference, and it is a useful common reference when the buyer, installer and factory need to agree on method.
5. How often will it be refinished?
This is the condition most often left out of an RFQ, and it matters over the life of the floor. Solid oak can be sanded repeatedly over its life, down toward the tongue. An engineered board can be sanded only within its wear layer. If the floor is in a home the owner expects to keep for decades and sand more than once, that points toward solid or toward an engineered board with a thicker wear layer. If the floor is expected to be maintained mainly by cleaning and recoating, a thinner wear layer may be enough.
Our standard wear layers are 3mm and 6mm sawn, with 0.6mm, 1.2mm, 2mm, 4mm and 5mm sawn to order. The wear layer guide explains how that choice relates to future sanding.
Decision table
| Project condition | Points toward solid | Points toward engineered |
|---|---|---|
| Board width | Narrower boards | Wider boards (3-layer) |
| Floor height | Room for full thickness | Height is limited (2-layer) |
| Open area | Smaller rooms | Larger open areas (3-layer) |
| Format | Plank in narrower widths | Herringbone and chevron (2-layer is common) |
| Refinishing plan | Repeated sanding is a priority | Maintenance mainly by recoating, or a thicker wear layer chosen |
| Subfloor | Confirmed suitable by the installer | Wider range of subfloor conditions |
No single row decides the question. A narrow-plank floor in a small room, over a suitable subfloor, where the owner wants the longest refinishing life, points clearly to solid. A wide-plank floor across an open-plan space points clearly to 3-layer. A herringbone floor in a renovation with limited height points to 2-layer. Most projects sit somewhere between, and the useful exercise is to rank the conditions for that particular site.
What stays the same across all three
Whichever construction you choose, the visible floor is specified the same way:
- Species: French White Oak.
- Grade: Premium, Select, Natural or Rustic.
- Surface: smooth, brushed or wire-brushed, from light to deeper brushing.
- Finish: UV finish, custom finish, or supplied unfinished for site finishing.
- Sheen: Matte, Extra Matte or Ultra Matte.
- Color: one of 211 colors in our library, or developed against your own reference and approved on a physical sample.
More than one format or board size can be produced within one order while staying within the same approved color standard. That makes it possible to mix constructions within one project, for example 2-layer herringbone in a hallway and wider 3-layer plank in an open living area, while keeping the color matched.
Checklist: what to ask your supplier
- Which construction is the quotation based on, and what is the core?
- Is the wear layer sawn, and how thick is it?
- Is the thickness a standard build or made to order?
- Is the width current production or made to order?
- Can different constructions in one order be held to the same approved color reference?
- Is the sample made with the intended production construction and finish?
- Has the installer confirmed the subfloor and installation method for this construction?
Working with Vu Uy Wood
We have manufactured solid and engineered hardwood flooring for export projects since 2006, with construction, dimensions, color and finish made to buyer specification. Drying, bonding, machining, finishing and final inspection are controlled in-house. Our Specify page starts with construction and explains the trade-offs at each step, then turns your selections into a written specification. We normally reply within one working day.