Recoat vs full refinish — which do you need?
The single most important decision — and the one that saves the most money — is whether your floor needs a full refinish or just a recoat.
A recoat (screen-and-recoat / buff-and-coat)
The existing finish is lightly abraded with a buffer and screen, then a fresh topcoat is applied over the top. No sanding back to bare wood, no dust, far less cost, and the floor is usable again within a day or two. This works only while the finish layer is still intact — before the wear reaches the timber itself.
A full refinish (sand-and-refinish)
The floor is sanded all the way back to raw timber and the finish is rebuilt from scratch. This is the reset — it removes gouges, stains, old colour, and worn-through patches, and it is the only option once the wear has gone past the coating. It is also your one chance to change the colour or sheen.
Rule of thumb: if you can see bare or grey timber, deep scratches that catch a fingernail, or water staining, you need a full refinish. If the floor just looks dull and lightly scuffed but the coating is unbroken, a recoat will do. More on overcoating →
Signs your floor needs a full refinish
- Bare or greying wood in walkways and in front of doors — the finish has worn through and the timber is now unprotected.
- Deep scratches that catch your fingernail and run into the wood, not just the coating.
- Water marks, dark spots or cupping — moisture has reached the timber and needs sanding out (fix the moisture source first).
- Peeling, flaking or a cloudy finish that a recoat would simply seal in.
- You want to change the colour — stain can only be applied to bare, freshly sanded timber.
If none of these apply and the floor is just tired-looking, start with the cheaper recoat and save the full refinish for when it is genuinely needed — every full sand removes a little timber, and a floor can only be sanded so many times in its life.
The 8-step refinishing process
This is what a professional refinish actually involves. Understanding it helps you judge a quote and know what good work looks like.
- Prepare the room. Clear everything out, remove shoe/quarter-round moulding, punch any protruding nails below the surface, and seal doorways and vents so dust stays contained.
- Coarse sand to bare timber. The first cut with a coarse grit (24–40) strips the old finish and levels surface damage, always working with the grain. Modern dust-containment systems capture nearly all the airborne dust.
- Edge and detail sand. An edge sander handles the perimeter the big machine can't reach; corners are scraped by hand so the whole floor is cut evenly.
- Progressively finer cuts. Repeat with finer grits (around 60, then 80–120) until the surface is uniform and free of coarse scratch marks. Skipping grits leaves swirl that shows through the finish.
- Screen and vacuum. Buff the whole floor with a fine screen to blend the cuts, then vacuum thoroughly and tack-wipe. Any dust left now becomes a bump in the finish.
- Stain or prime. Apply a primer/sealer to protect the raw wood and control the final look. This is the stage to add stain if you're changing colour — different primers shift the tone (natural, warm, or whitewashed). More on primers →
- Apply the topcoats. Two to three coats of polyurethane, lightly abrading between each and respecting the dry time. More coats and better product mean a longer-lasting floor.
- Cure and refit. Let the finish harden, refit the trim, and stay off it with furniture and rugs until it reaches full cure — surface-dry is not the same as cured.
DIY vs hiring a professional
Refinishing is one of the few home jobs where the tool itself is the risk. A drum or belt sander removes timber fast, and a moment's hesitation in one spot leaves a dish or chatter mark that can only be corrected by sanding the whole floor deeper — using up irreplaceable wood.
Consider DIY if
- You're doing a recoat (no aggressive sanding) rather than a full sand-back.
- The area is small, the timber is inexpensive, and a less-than-perfect result is acceptable.
- You can hire quality machines and you've practised on an offcut or a hidden area first.
Hire a professional if
- The floor is valuable, large, or has parquet/herringbone or detailed borders.
- You want an even, dead-flat, factory-grade finish with no swirl or edge lines.
- You're changing colour with stain, where blotching is hard to avoid by hand.
A good way to find someone is to look for trade-trained, manufacturer-certified contractors who use dust-containment systems. How dust-free sanding works →
Choosing your finish
The topcoat decides how the floor looks, how it ages, and how long before you're back here again.
Water-based vs oil-based
Water-based polyurethane dries fast, has low odour, stays clear instead of yellowing, and is the modern default for homes. Oil-based (solvent) finishes add an amber warmth and a slightly different feel but smell strongly, dry slowly, and yellow over time. Full water-based vs solvent comparison →
Durability grade
For ordinary homes a quality 1-component water-based topcoat is plenty. For very high traffic, rentals, or commercial floors, step up to a two-component (2K) water-based finish for maximum scuff and chemical resistance.
Sheen
From extra-matt through matt, satin and gloss. Lower sheens hide scratches, dust and pet hair far better than gloss and are the popular modern choice; gloss looks dramatic but shows every mark. Help choosing a finish →
Whatever you choose, ask the contractor for the exact product name and number of coats in writing. "Two coats of polyurethane" and "three coats of a premium 2K water-based topcoat" are very different floors.
Cost and timeline
Refinishing is normally priced by area — per square metre or per square foot — so the total scales with floor size. The big cost driver is whether it's a recoat or a full sand-back:
- Recoat: the cheapest option because there's no sanding labour — usually a fraction of a full refinish.
- Full sand-and-refinish: more, because of the labour-intensive multi-pass sanding plus sealer and several topcoats.
- Extras that add cost: stain/colour change, repairs to boards, gap filling, stairs, and premium 2K finishes.
Prices vary widely by country and region, so get two or three itemised local quotes rather than relying on a single online figure. A good quote states the area, the number of coats, and the specific finish product.
Timeline: a typical room is 2–4 days — roughly one day to sand, then sealer and topcoats over the following days with dry time between each. Water-based finishes are quickest; you can often walk on socks within hours, with full cure over the following days to weeks.
Aftercare — making it last
A refinish is only as good as the care that follows. To get the maximum years before the next one:
- Keep furniture and rugs off until the finish has fully cured, not just dried.
- Use felt pads under furniture legs and a quality doormat at every entrance to trap grit.
- Sweep or vacuum regularly and clean with a pH-neutral wood-floor cleaner — never a steam mop or all-purpose spray.
- Wipe spills promptly and keep indoor humidity stable to avoid cupping and gapping.
- Plan a recoat every few years — it refreshes the surface cheaply and pushes the next full refinish years further out.
Frequently asked questions
How often do hardwood floors need refinishing?
A solid timber floor typically needs a full sand-and-refinish every 7–15 years depending on traffic. A buff-and-recoat every 3–5 years in between refreshes the finish without sanding back and stretches the time between full refinishes.
Can I refinish hardwood floors without sanding?
Yes — if the finish is only lightly worn and not peeling or worn through to bare wood, a recoat (screen-and-recoat) abrades the top layer and adds a fresh coat with no sand-back. Once the timber itself is exposed, deeply scratched, or water-damaged, a full resand is required.
How long does it take to refinish a hardwood floor?
A typical room takes 2–4 days: usually one day to sand, then sealer and topcoats over the following days with dry time between each. Water-based finishes dry fastest and often allow same-day recoats.
Should I refinish floors myself or hire a professional?
Drum sanders are unforgiving and first-timer gouges can only be fixed by sanding deeper, which shortens the floor's life. DIY suits recoats, small areas, and inexpensive timber; full refinishes on valuable or large floors are usually worth a professional.
What is the best finish for refinishing hardwood floors?
For most homes a high-quality water-based polyurethane gives the best balance of durability, low odour, fast drying, and non-yellowing clarity. Very high-traffic floors suit a two-component (2K) water-based topcoat; hardwax-oils suit a natural, matt, repairable look.
How much does it cost to refinish hardwood floors?
It's priced per square metre/foot and varies widely by region, condition, and finish. Recoats cost far less than a full sand-and-refinish because there's no sanding labour. Get itemised local quotes that state the number of coats and the exact finish product.