The short difference
Finished wood has a protective coating, such as polyurethane, varnish, oil or wax, already applied. Unfinished wood is raw, sanded or unsanded timber with no protective coating, so it needs sanding, staining if desired, and sealing before it is used in most places.
For flooring, the two choices are often called prefinished (factory-finished) and unfinished (site-finished). Each has real advantages, and the right one depends on speed, customization, budget, tolerance for mess and the skills available.
What counts as unfinished or unsealed wood
Unsealed wood has no coating that keeps out moisture, dirt or oils. It absorbs liquids readily and can stain, swell or mark easily. Raw floorboards, freshly sanded floors that have not yet been coated, and bare furniture or cabinet parts are examples. Wood that has only been stained but not sealed is also considered unsealed, since stain is color rather than protection (see wood sealer vs. stain). A floor with a worn-through finish may be partly unsealed in traffic areas.
Pros and cons of finished (prefinished) wood
Advantages
- Faster to install, and ready for use sooner, since no on-site finishing is needed.
- Factory finishes are applied in controlled conditions, and many are designed to be durable.
- Less dust, odor and mess in your home during installation.
- Predictable appearance, since you can see the product beforehand.
Drawbacks
- Limited to the colors and sheens the manufacturer offers.
- Boards often have beveled or micro-beveled edges, which show seams between boards and can collect dirt.
- Refinishing options may be limited, especially for thin wear layers.
- Boards that are slightly uneven can show it more, since there is no site sanding to level the surface.
Pros and cons of unfinished wood
Advantages
- Freedom to choose stain color and finish type, including matching existing floors.
- Site sanding creates a flat, seamless surface across boards.
- Finish choice and number of coats are under your control.
Drawbacks
- Sanding and coating involves significant dust, fumes and time.
- You cannot walk on the floor, move furniture or use the room for the full finishing and curing period.
- Results depend on skill and conditions, such as humidity and temperature.
- More steps mean more room for error.
Side-by-side comparison
| Finished | Unfinished | |
|---|---|---|
| Installation speed | Faster | Slower, with finishing steps |
| Mess on site | Less | Dust and fumes |
| Color choice | Manufacturer range | Custom |
| Surface | Often beveled edges | Flat, sanded across boards |
| Protection on arrival | Yes | None |
| Skill needed | Install skills | Install plus finishing skills |
Safety with on-site finishing
If you choose unfinished wood and plan to finish it yourself, the safety work is significant.
- Dust: Wear a respirator rated for fine dust, eye protection and hearing protection. Use sanders with dust collection and keep dust out of the rest of the house.
- Fumes: Stains and many finishes release vapors. Ventilate well, follow the label on respirators or cartridge types if required, and keep children and pets away.
- Fire: Keep sparks, flames and pilot lights away from vapors as the label directs. Fine wood dust can also burn.
- Oily rags: Rags with oil-based stain or finish can self-heat and ignite. Dry them flat outdoors or store them in a water-filled sealed metal container as directed on the label.
- Large floor sanders: Drum sanders can damage a floor quickly and can be hard to handle. Get instruction from the rental shop and never leave a running machine unattended.
- Old finishes: If you refinish an older floor, take lead precautions where relevant, and see our guide on changing the color of a hardwood floor for more detail.
Can you mop unfinished hardwood floors?
Avoid wet mopping. Unfinished wood has no barrier, so water and cleaners can soak in, raise the grain, stain the wood or cause swelling. Instead, sweep or vacuum with a soft attachment and spot-clean with a barely damp cloth, drying right away. Better still, seal the floor so cleaning is practical. For finished floors, follow the manufacturer’s cleaning instructions, since many do not recommend heavy water either.
Cost factors
Pricing varies by region, species, grade and who does the work, so use local quotes. In general, unfinished flooring can have a lower material cost than comparable prefinished products, but sanding, staining, finishing materials, equipment rental, and labor add to it. Prefinished boards bundle those steps into the product. When comparing, include everything, including the cost of mistakes and the time the room is out of use.
Where to buy
Unfinished and prefinished hardwood are sold by flooring specialists, lumber yards and many large home-improvement retailers, but selection varies by store and region. Whether a particular retailer carries unfinished flooring in your area is best confirmed with that store directly or on its website. Ask about species, grade, board width and moisture content, and ask whether the product should be acclimated before installation.
Beyond floors
The same ideas apply to furniture, trim and cabinets. Unfinished pieces let you choose the color and sheen, but they need sanding and sealing before use. Our guide to wood finishes and wood finish sheen guide help with those choices. Finished items are ready to use but may be harder to restain. If you only want an opaque color, see painting wood floors. Note that wood laminate products, covered in types of wood laminate flooring, come with a factory surface and are not finished on site.
Which to choose
Choose finished if you want speed, less mess and a predictable result, or if you are not comfortable with sanding and finishing. Choose unfinished if you need a custom color, want a flat seamless surface, are matching an existing floor, or have access to a skilled finisher. In both cases, read the manufacturer’s instructions and consider hiring a professional for the sanding and finishing stages if you are unsure.