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Hardwood Refinishing

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Sand, stain and refinish worn hardwood floors. Tell us about your floor refinishing project and we’ll help you find local floor refinishers who serve your area.

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Hardwood refinishing brings a worn wood floor back by renewing or removing its finish. It ranges from a light screen-and-recoat, which refreshes the existing finish with a new coat, to a full sand-and-refinish that takes the floor down to bare wood, allows repairs and rebuilds the stain and finish from scratch. It's also how original floors hidden under carpet or old coverings, a common find in older homes, are brought back to life.

The job is dusty, smelly and disruptive while it lasts, and the result depends on judgment as much as equipment: reading how much wood is left, choosing a finish that suits the household, controlling dust, ventilating while the finish gives off vapours and waiting long enough before the furniture comes back.

This page covers both approaches and how to tell which one a floor needs, engineered floors, stains and finishes, dust, VOCs and ventilation, lead paint and asbestos in older homes, and living through the work. For new floors, see the hardwood flooring page.

Screen and recoat vs full sand and refinish: what each involves

A screen-and-recoat, also called a buff and coat, lightly abrades the existing finish so a new coat can bond, then adds fresh finish. It doesn't reach the wood, so it can't remove deep scratches, greyed traffic paths or old stain, but it's quicker, far less dusty and uses up none of the floor's thickness.

A full sand-and-refinish removes the old finish and a thin layer of wood with progressively finer abrasives. It flattens uneven boards and leaves bare wood ready for repairs, a new stain colour and a completely rebuilt finish.

  • Adhesion test: a floor waxed in the past, or cleaned with products that leave residue, may reject a new coat, so the finisher tests a small area before recoating.
  • Prefinished floors: some factory finishes are hard to recoat and need a specific bonding process or product, so ask what the finisher plans for yours.

Signs your hardwood floor needs a recoat or a full sanding

  • Water test: drops that bead on a busy area suggest the finish still protects; drops that soak in and darken the wood mean it's worn through there.
  • Colour: grey or dark areas in walkways, at doors or in front of the sink are bare, soiled wood that only sanding removes.
  • Scratches: marks confined to the finish can fade under a recoat, while ones that reach raw wood need sanding.
  • Board shape: cupped or crowned boards and ledges between boards need sanding to flatten, but only once the moisture behind them is fixed.
  • Past sandings: exposed nail heads or tongues showing at board edges mean little wood is left, and another full sanding may not be advisable.

How many times can engineered hardwood be sanded? It depends on the wear layer

Engineered hardwood can only be refinished within its wear layer, the real wood on top of the core. A thick wear layer can take more than one full sanding; a thin one may allow a single careful sanding or none, and some engineered floors are designed only to be recoated. Solid floors have limits too, since each sanding removes wood above the tongue, but they're usually further away.

Before quoting, a finisher should find out what's there: lift a floor register or threshold to see a board's edge, check the product information if you still have it, and look for signs of earlier sanding. Sanding through the wear layer exposes the core and can only be fixed by replacing boards, so with a thin layer, a recoat is the safer choice.

Floor stains and finishes: oil-based, water-based and hardwax oil

Stain sets the colour; the finish protects it. Because some species take stain unevenly, a good finisher applies samples on the actual floor and lets you approve them in the room's own light.

  • Oil-based polyurethane: an amber tone that deepens with time and a tough film, but a strong solvent smell and longer waits between coats.
  • Water-based finish: clear and non-yellowing, so pale woods stay pale, with less odour and faster recoating; higher-grade products are made for heavy traffic.
  • Hardwax oil: penetrates and hardens in the wood for a natural, low-sheen look; worn spots can be touched up locally, but it needs periodic maintenance coats.
  • Sheen: matte and satin hide scratches and dust better than gloss, which shows every mark.
  • Colour: very dark and very pale floors both show dust and scratches, while mid-tones are the most forgiving.

The floor sanding process and dust control

A full refinish usually follows the same order: repairs and board replacement, sanding with a large drum or belt sander and an edger along the walls, filling, fine sanding, vacuuming, stain if chosen, then several coats of finish with light abrasion between them.

Sanding throws off a large amount of fine dust. Sanders linked to a dust-collection system or a high-efficiency vacuum capture much of it at the source, but containment still matters: plastic sheeting over doorways, return-air grilles covered, the heating system's filter checked after the job and thorough vacuuming between steps, because dust left behind ends up trapped as specks in the finish. Ask how the crew handles dust and what cleanup is included.

Floor finish fumes, VOCs and ventilation, winter included

Floor finishes, stains and some fillers give off volatile organic compounds, or VOCs. Health Canada lists varnish and glues among the building materials that release them, says exposure to some VOCs can cause fatigue, nausea, dizziness, headaches, breathing problems and eye, nose and throat irritation, and recommends more ventilation and low-emission products, noting that some varnishes emit fewer VOCs than others.

Plan airflow with the finisher: windows open when outdoor conditions allow, fans exhausting air outside, and the label's flammability warnings followed for solvent-based products. Children, pets and anyone sensitive to odours are better off elsewhere while coats go on and the smell is strong. In winter, when windows stay mostly shut, a low-odour water-based finish is often the more livable choice.

Lead paint and asbestos when refinishing floors in older homes

Health Canada says a home built before 1960 probably contains lead-based paint, and it mentions stairs and railings among the painted surfaces of concern. Have painted floors and stairs tested before any sanding: Health Canada's advice is not to sand, heat-gun or torch lead-based paint, and to keep children and pregnant women away from the work area.

Original hardwood found under old vinyl tiles or linoleum raises a second issue, since the Quebec government lists vinyl tiles, linoleum and adhesive coatings among materials that may contain asbestos. Health Canada advises having a professional test before renovating and hiring a qualified removal specialist if asbestos is found, so don't lift the covering or sand the glue left on the wood until the results are in.

Dry time vs cure time: living through a floor refinish

A finish that's dry to the touch can take socks, then shoes, well before it's fully hard; curing continues for much longer and depends on the product, the number of coats, temperature, humidity and airflow. The label and the finisher give the timings for foot traffic, furniture and rugs. Rugs come back last, because they can trap vapours and mark a finish that hasn't fully cured.

Plan the logistics before the crew arrives: empty the rooms, clear closets that will be sanded, decide where the furniture will go and work out another route through the house if the only one crosses the floor. Some households stay elsewhere for the sanding and finishing, or refinish in stages so part of the home stays usable. When furniture returns, lift it into place with felt pads already fitted.

Hardwood Refinishing: frequently asked questions

Can I refinish only one room or part of a floor?

Yes, but where the floor runs continuously into another room, the line where the new finish stops will show, since the old finish has aged. Finishers usually stop at a doorway, threshold or change in board direction so the transition looks intentional.

Can a hardwood floor be refinished in a different colour?

Yes, with a full sanding to bare wood, within what the species allows: oak takes dark stains readily, while maple and birch can blotch and may need a conditioner or a lighter colour. A recoat can't change the colour.

Does refinishing fix gaps between boards?

Not seasonal ones: filler in gaps that open and close with the seasons tends to crack and fall out. Wide, permanent gaps can be filled or fitted with slivers of wood during a full sanding, once the moisture cause is understood.

Should floors be refinished before or after painting?

A common sequence is to sand and apply the first coats, let the painters do walls and trim, then have the finisher return for the final coat, so paint drips and ladder marks don't end up on the finished floor. Settle the sequence with the painter and the finisher before either starts.

Sources

  1. Volatile organic compounds — Health Canada
  2. Lead-based paint — Health Canada
  3. Asbestos and your health — Health Canada
  4. Preventing health problems associated with asbestos — Gouvernement du Québec

Written by the LokalMatch editorial team. Last reviewed September 10, 2026.

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What affects the cost of floor refinishing

Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:

  • Floor area and the number of rooms
  • Type and grade of flooring
  • Removal of the existing floor
  • Subfloor repairs or levelling
  • Stairs, angles and custom cuts
  • Trim, transitions and baseboards

How to compare floor refinishers before you hire

  • Choose an installer who works regularly with the type of flooring you want, since hardwood, tile, vinyl and carpet each need different skills.
  • Ask them to check the subfloor and moisture levels before giving a final price.
  • Get a written quote that covers removal of the old floor, subfloor prep, underlay, trim and transitions.
  • Ask whether you or the installer will supply the flooring, and who is responsible for ordering extra for waste.
  • Look at recent work in person or in photos, paying attention to seams, edges and transitions.

Questions to ask floor refinishers before you hire

  • Will you remove and dispose of the old flooring?
  • How will you check and prepare the subfloor?
  • Is my space suitable for this type of flooring, especially in a basement, kitchen or bathroom?
  • Are baseboards, transitions and stair nosings included?
  • Will you move the furniture and appliances, or should I?
  • Does your workmanship warranty cover problems like lifting, gaps or cracked tiles?

Floor refinishing permits and local rules

Some floor refinishing work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.

Permits and licensing

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