Floor refinishing, and how much floor you have left
Sanding a wood floor back to bare and refinishing it is the best value in the whole flooring industry - right up until there is not enough wood above the tongue to sand. That measurement comes first.
What is floor refinishing?
Floor refinishing means sanding a wood floor down past its old finish and any surface damage, then applying new stain and protective coats. A full sand-and-finish removes a thin layer of the wood itself, so it can only be done a limited number of times - what governs is how much wood sits above the tongue. A lighter screen and recoat refreshes the finish without touching the wood, and suits floors that are dull but not damaged.
Signs you need floor refinishing
- The finish has worn through to bare wood in traffic lanes, in front of the sink or at the top of the stairs
- The floor looks permanently dirty after cleaning because the finish itself has gone cloudy and micro-scratched
- There are surface scratches you can feel with a fingernail but that do not go deep into the wood
- Pet urine or spills have darkened the finish but the boards underneath are still sound
- You want a different colour, and the boards are a species that takes stain predictably
- Boards are structurally fine but a previous refinish left drum marks, waves or an uneven sheen
- You have carpet over hardwood and want to know whether what is underneath is worth uncovering
Seeing something not on this list? Browse flooring problems by symptom →
How floor refinishing actually works
Wear-layer assessment
The installer lifts a vent register or a threshold to see the board in cross-section, and measures how much wood sits above the tongue. That thickness, not the surface appearance, decides whether a full sand is possible at all.
Watch forA quote for a full sand on an engineered floor with no wear layer measurement. Engineered boards have a thin real-wood veneer over plywood, and sanding through it is unrecoverable.
Deciding between a recoat and a full sand
If the finish is intact and only dull, a screen-and-recoat abrades the top of the existing finish and lays a new coat over it - far cheaper, one day, and it consumes none of the wood. A full sand is for wear-through, colour change or deep damage.
Watch forBeing sold a full sand for a floor that only needs a recoat. Ask directly: "is the finish worn through anywhere, or just dull?" Recoating cannot fix bare spots or stains, but if there are none, it should be on the table.
Repairs and preparation
Loose boards are refastened, damaged boards replaced, protruding fasteners set below the surface, and gaps assessed. Base shoe is usually removed. The room is emptied and doorways sealed with plastic.
Watch forNail heads not set before sanding. A single proud nail will gouge the drum sanding belt and drag a line the length of the room.
Rough sanding
A large belt or drum machine takes the first cut with coarse abrasive, running along the boards. An edger works the perimeter the big machine cannot reach, and a scraper handles corners.
Watch forCross-grain sanding marks or a dished-out perimeter where the edger was held in one place. Both show up permanently once stain goes on and cannot be corrected without another full sand.
Intermediate and fine sanding
Successive passes with finer abrasive remove the scratch pattern from the previous grit. A buffer with a fine screen usually blends the field and the edged perimeter into one surface.
Watch forA crew skipping grits to save time. Coarse scratch left in the wood is invisible on bare timber and glaringly obvious the moment stain hits it.
Staining, where you are changing colour
Stain is applied and wiped back. Species matters enormously here - some woods take stain evenly, others blotch badly and need a conditioner or a different approach.
Watch forNo sample done on your actual floor. Stain colour on a manufacturer chip has almost nothing to do with how it lands on your species and your sanding. Insist on a test patch in the room, viewed in daylight.
Finish coats
Typically two to three coats of a waterborne or oil-modified finish, with light abrasion between coats. Waterborne dries fast and stays clear; oil-modified ambers over time and takes longer between coats.
Watch forCoat counts left vague. Get the number of coats and the product name written into the quote, because the difference between two coats and three is most of the floor's service life.
Cure and re-entry
Dry to walk on and fully cured are different things by a wide margin. Light stocking-foot traffic usually returns within a day or so; furniture, rugs and pets wait considerably longer depending on the product.
Watch forRugs going back down early. A rug over a finish that has not fully cured traps solvent and can leave a permanent outline of the rug on your new floor.
What does floor refinishing cost?
Refinishing is typically quoted per square foot and lands well below the cost of replacing the same floor - which is most of its appeal. A screen-and-recoat costs a fraction of a full sand-and-finish. Stain colour changes and extensive board repairs add. See the Cost Guide for ranges.
See the full floor refinishing cost guide - by material, size and region →
If the number is the problem, here are the ways people pay for it →
HomeMatchup does not perform floor refinishing. We match you with licensed local flooring pros for floor refinishing. Free for homeowners — Get matched free · how we verify pros.
When floor refinishing is the wrong call
When saying yes is the wrong move:
- There is not enough wood above the tongue. On a floor that has already been sanded two or three times, another pass can expose fasteners and reach the tongue. Have it measured through a vent opening before anyone quotes.
- The floor is engineered with a thin veneer. Many engineered products have a wear layer too thin to survive a drum sanding. Some can take one light sand; many can only be recoated. The manufacturer's spec decides this, not optimism.
- Boards are cupped and the moisture cause is still active. Sanding a cupped floor flat while it is still wet means that when it dries and flattens, you get crowning instead - and you have spent your wear layer to get there. Dry it out first, then reassess.
- The floor is laminate or vinyl plank. Neither has real wood to sand. Laminate is a printed layer over fibreboard, and vinyl plank is a printed film under a wear coat. Refinishing is not a thing on either, whatever a general contractor tells you.
- You cannot vacate the space. Every room being refinished must be empty and closed off, and the whole area is out of use for several days. In a one-bathroom house with the only bathroom past the work zone, this is a genuine problem worth planning around.
- Pet urine has penetrated to the subfloor. Deep black staining and odour that survives sanding is in the wood and sometimes below it. Board replacement, and sometimes subfloor sealing, is the honest answer - sanding alone will not remove the smell.
Types of floor refinishing
| Option | What it means for you |
|---|---|
| Refinish vs replace | The comparison this page exists to inform - worked through properly in the Comparisons archive. |
| Wood material guides | Solid hardwood, engineered hardwood and bamboo - what each can and cannot take. |
| Floor colour guides | Light, medium, dark, whitewashed and natural oak tones on real wood. |
Can I do this myself?
Reasonable to DIY
- Emptying and prepping the rooms, and removing base shoe carefully if you want to reuse it
- Lifting a floor vent and photographing the board edge so you can discuss wear layer with a pro
- Doing your own screen-and-recoat on a small, undamaged floor with a rented buffer - the low-risk end of this work
- Applying maintenance coats on a hardwax-oil floor, which is designed for owner recoating
Call a licensed pro
- Any full drum sanding. A rented drum sander held stationary for two seconds leaves a dish you cannot sand out
- Colour changes, where blotch-prone species and edger blending decide the whole result
- Floors with an unknown existing finish, since some old finishes react badly with new products
- Anything where the wear layer is marginal and one wrong pass ends the floor
What to check when hiring for floor refinishing
- How much wear layer does my floor have, and how did you check? The one question that decides whether this job should happen. It requires lifting something, not looking at the surface.
- Does this floor need a full sand or would a recoat do? A refinisher who volunteers the cheaper option when it fits is telling you something useful about the rest of their advice.
- How many finish coats, and which product? Coat count and product family determine durability and cure time. Both belong on the quote in writing.
- Will you do a stain sample on my floor before committing? Species and sanding change stain colour dramatically. A sample on your boards in your light is the only reliable preview.
- What dust containment do you use? Dust-containment sanding systems are common now. Ask what happens at doorways, returns and the HVAC system regardless.
- When can we walk on it, and when can rugs and furniture go back? Two different dates. Getting the rug date wrong permanently marks the finish.
- Are baseboard and shoe removal and reinstallation included? A common exclusion. Refinishing up to a shoe moulding that stays put leaves a visible old-finish line at the wall.
Floor Refinishing near you
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Sources
Sources last checked
- Formaldehyde Emission Standards for Composite WoodU.S. Environmental Protection AgencyRetrieved 2026-08-04Federal standards relevant to some flooring and underlayment products.
- Occupational Employment and Wages — Construction TradesU.S. Bureau of Labor StatisticsRetrieved 2026-08-04Labor cost context for home-services trades nationally.
Sources for figures and claims on this page.
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