First: refinish, recoat or replace?
| Option | What it is | When it fits |
|---|---|---|
| Screen and recoat | Clean, lightly scuff the existing finish, and apply a fresh coat. No sanding to bare wood. | The finish is dull or lightly scratched, but the wood isn't damaged and you're keeping the color. |
| Full sand and refinish | Sand to bare wood, stain if you want, and apply new finish. | Deep scratches, dents, worn-through finish, or you want a new color. |
| Replace or install new | New solid or engineered hardwood. | The floor is too thin to sand, badly damaged, or there's no wood there now. |
Sources: NWFA, NWFA Hardwood Floors magazine, Bona. Good news: the NWFA says most scratches are in the finish, not the wood (NWFA), so a recoat often goes further than people expect.
One catch with recoating: cleaners that claim to “rejuvenate,” “shine” or “polish” can leave film or wax behind that makes a recoat difficult (NWFA). Tell us what you've been cleaning with.
Can your floor be refinished?
- Solid hardwood can usually be sanded six to eight times over its life. Each full sanding takes off about 1/32" to 1/16" (NWFA).
- Engineered hardwood depends on its top layer, which ranges from 1/16" to 1/4". Under 3/32" (2.38 mm), sanding isn't recommended (NWFA).
- Check before sanding. The NWFA method checks the wood thickness above the tongue; if the floor is already close to the tongue, it's time for new (NWFA).
- Cupped boards shouldn't be sanded until the moisture problem is fixed (NWFA).
- Heavily distressed floors are extremely difficult, and often can't be sanded (NWFA).
Picking a finish
| Finish | Look | Dry and cure | Odor / VOC |
|---|---|---|---|
| Oil-modified polyurethane | Amber tone that deepens over time | 8–24 hours to dry; 14–30 days to cure | Higher VOC, stronger odor |
| Water-based polyurethane | Clear, non-yellowing | 2–3 hours to dry; 3–7 days to cure | Low VOC |
| Hardwax oil | Penetrates the wood for a natural look | Bona Craft Oil 2K: light use at 12–24 hours; cures in about 5–7 days | Many state 0 g/L VOC |
Sources: NWFA, Bona, Bona. Bona says quality finishes of either type can last about 10 years. With a water-based finish like Bona Traffic HD, you can walk on it after 24 hours, but hold off on area rugs until it's fully cured (Bona Traffic HD).
Staining tip: maple and birch tend to stain blotchy, even with conditioner (NWFA maple, NWFA birch). If you have maple or birch and want it darker, test a sample board first.
Installing new: solid vs engineered
| Solid | Engineered | |
|---|---|---|
| Built | One piece of wood, top to bottom | Real wood top layer over crisscrossed plywood layers |
| Refinishing | Many times | Depends on top-layer thickness |
| Where | On or above grade | Any level, including basements, concrete and radiant heat |
| Install | Nailed down over a wood subfloor | Staple, glue-down or floating |
| Widths | About 2¼" strips to 5" planks | About 3" to 7½" planks; more stable in wide boards |
Sources: NWFA, NWFA handbook, Bruce.
Species and hardness. The Janka scale measures how hard a species is (for solid wood, not engineered). From the NWFA's table: hickory/pecan 1820, hard maple 1450, white oak 1360, red oak 1290, birch 1260 (NWFA, NWFA handbook). Harder species resist dents better.
Minnesota winters and wood floors
Wood moves with humidity. The NWFA recommends keeping your home at 60–80°F and 30–50% humidity year-round (NWFA). In dry Minnesota winters, floors lose moisture and small gaps between boards are normal if they come and go with the seasons; a humidifier helps (NWFA, NWFA handbook). How dry? On a −10°F dew point day, outdoor air heated to 68°F inside falls to about 4% relative humidity (UMN Extension). One Minnesota balancing act: the University of Minnesota Extension says 25% humidity in winter is generally healthy and better for the house, because higher humidity causes window condensation in extreme cold (UMN Extension). If your windows sweat, turn the humidifier down and accept a few winter gaps; Extension has long advised lowering humidity in very cold weather when windows show condensation (UMN Extension). When floors gain moisture, they can cup: edges higher than the centers (NWFA).
Older homes: lead-safe sanding
If your home was built before 1978 and the floor has paint or another coating with lead, EPA's lead-safe rules apply to paid work that disturbs it. EPA specifically addresses sanding a hardwood floor, with HEPA vacuuming and cleaning required (EPA).
What it costs in the Twin Cities
Refinishing: Angi puts Minneapolis at $4–$8 per sq ft, with most homeowners spending about $1,552 (Angi Minneapolis), and Homewyse’s cost calculator for St. Paul (ZIP 55101, September 2026) says $7.43–$9.06 per sq ft (Homewyse). A buff and recoat runs about $1–$2.50 per sq ft nationally (Angi). New hardwood: Homewyse's St. Paul calculator says $14.85–$18.81 per sq ft installed (Homewyse), and Angi says Minneapolis projects average about $4,483, with high-grade installs up to $25 per sq ft (Angi Minneapolis). Refinishing usually costs a fraction of new, which is why it's worth checking first.
Hardwood vs LVP
LVP handles water better, so it wins in basements, bathrooms and entries (see LVP vs laminate). Hardwood wins on resale and lifespan: it can be refinished again and again, while LVP can't be sanded. For main-level living areas, buyers ask for hardwood by name (next section).
If you're selling
- Buyers want it. 81% of buyers in NAHB's survey rated hardwood in main-level living areas as essential or desirable (NAHB).
- It can pay. The NWFA says identical homes with wood floors can sell for up to 10% more, based on a survey of real estate agents (NWFA).
- It makes owners happy. New wood flooring scored 9.1 out of 10 on NAR's 2025 “Joy Score” (NAR 2025).
- Hardwood under the carpet? Check it before buying new flooring. Refinishing costs a fraction of new (see costs above).
Where the money is best spent
- Refinish before you replace. If the wood is thick enough, sanding and refinishing costs a fraction of new.
- Recoat before you refinish. If only the finish is worn, a screen and recoat is cheaper still.
- Engineered below grade. For basements and over concrete, engineered hardwood is the right product.