You love your hardwood floors, but they've seen better days. The finish looks dull, there are a few scuffs by the back door, and you're wondering whether the floor needs a full makeover or just a little attention. If you're asking how to refinish hardwood floors, the honest answer is that some floors are good candidates and some aren't, so it pays to size up the job before you rent a single sander. Let's walk through what to know first.
One quick note before we dive in: Empire Today® does not offer floor refinishing. Empire® focuses on new hardwood and wood-look flooring with professional installation. We're sharing this guide so you can make an informed choice, whether you refinish, hire a refinishing professional, or replace.
Does Your Floor Need Refinishing, or Something Simpler?
Dullness and light scuffs don't always call for sanding down to bare wood. Matching the fix to the problem can save you time, dust, and wood. Here's a simple way to sort it out:
- Cleaning and maintenance: Best when the issue is dirt, residue, or buildup rather than true wear. Check with your manufacturer for approved cleaners.
- Maintenance recoat: May be appropriate when the existing finish is suitable and the wear is on the surface. The new coat needs to be compatible with the old one, and the floor needs proper preparation.
- Full sanding and refinishing: May make sense for deeper wear, exposed wood, or a desired color change, as long as enough wood remains.
- Repair or replacement: This is often the better path when damage or construction makes restoration unsuitable.
Tip: A product-specific recoat system usually comes with its own preparation steps. Follow the instructions for the exact finish you choose.
Can You Refinish Hardwood Floors Yourself?
Some homeowners do, but it's not a casual weekend project. Solid hardwood can often be sanded and refinished more than once, which is why refinish wood floors DIY projects are tempting. Still, whether it's a good idea depends on your floor's condition, how much wood is left above the tongue and groove, your comfort with heavy equipment, and what's in the existing finish.
Engineered hardwood is a different story. Some engineered floors can be refinished and some cannot. The answer depends on the remaining wear-layer thickness, any previous sanding, the floor's condition, and the manufacturer's guidance. Peeking at an edge near a vent can tell you something, but it isn't enough approval to start sanding. Check your flooring documentation and warranty first, and ask a qualified hardwood refinishing professional if you're unsure.
Before You Sand: Safety and Suitability Checks
Run through these checks first. They're the unglamorous part of hardwood floor refinishing, and they can help prevent costly mistakes.
- Moisture and cupping: Cupped boards can point to a moisture problem. Don't sand until the source is found and fixed and the floor has stabilized, because sanding too early can damage the floor. A refinishing professional can assess this.
- Older painted floors: Paint in homes built before 1978 may contain lead, and sanding it can create hazardous dust. Have the paint assessed and follow current EPA guidance before disturbing it.
- Manufacturer and warranty requirements: Review your flooring documentation before sanding or applying a new coating.
- Gaps: Seasonal gaps between boards are normal as wood responds to humidity. Don't fill them by default. Repair actual defects, such as holes and damaged spots, instead.
- Fire risk: Rags soaked with stain or finish and other finishing waste can heat up and ignite on their own if handled improperly. Follow the product's disposal instructions exactly.
- Ventilation and ignition sources: Sanding calls for dust containment, while finishing calls for fresh airflow and no ignition sources. Follow the equipment instructions and the finish's safety data sheet.
What Equipment Do You Need to Refinish Hardwood Floors?
Hardwood floor sanding takes more than a handheld sander and a free Saturday. Most home centers rent the heavier machines, so gather everything before you begin. A typical list includes:
- Drum or orbital floor sander, plus an edger for areas along walls
- Sandpaper in progressive grits, from coarse to medium to fine
- Hand-sanding tools or a detail sander for corners and spots machines can't reach
- Pry bar, hammer, nail set, wood filler, and putty knife for prep and repairs
- Dust collection suited to your sander, plus a shop vacuum
- Cleaning supplies approved by the finish and flooring manufacturers
- Painter's tape, plastic sheeting, and drop cloths to contain dust
- Hardwood floor stain, if you're changing the color
- Hardwood floor polyurethane or another finish, plus quality applicators
- Respiratory protection rated for the hazards, eye and hearing protection, and knee pads
A generic dust mask may not be enough for every situation. Check the equipment instructions and the finish's safety data for the right respiratory protection.
How to Prepare the Room Before You Sand
Clear the room completely, including furniture, rugs, and floor vent covers. If base shoe or quarter-round molding blocks the sander from reaching the edges, remove it and label the pieces so reinstalling is simple. Seal off doorways and cabinets with plastic sheeting to help keep dust from spreading throughout the house.
Walk the floor and look closely for raised nails, loose boards, and small gouges. Set nails below the surface with a nail set and fill true holes or damaged spots with a wood filler compatible with your planned stain or finish. This kind of hardwood floor repair matters more than it seems, since sanding over an exposed fastener can tear paper, damage the machine, and leave scratches that are hard to remove.
How to Sand Hardwood Floors the Right Way
Start with the least aggressive grit that will remove the existing finish. A floor with heavy buildup of old finish may need a coarser grit, while a lightly scratched floor may be fine beginning at medium. Work with the grain, keep the sander moving steadily, and never let it sit in one spot, which can dig a low spot into the wood.
Use the edger along the walls. A standard round edger won't reach square corners, so plan on hand tools or detail sanding to finish those areas. Move through the grits in order, coarse to medium to fine, since each pass should erase the marks left by the one before it. Jumping straight from coarse to fine tends to show up as visible scratches once stain or finish goes on.
Vacuum thoroughly between every grit change. If you wipe the floor afterward, use only the cleaning method your finish manufacturer approves, and check with your manufacturer for approved cleaning products, since some treated cloths can leave residue that doesn't play well with the finish. Dust left behind is one of the easiest ways to end up with a gritty, uneven topcoat.
How Long Does Hardwood Floor Refinishing Take?
Set expectations early: this is not a one-day project. Even a single room can take several days once you factor in sanding, cleanup, staining, and multiple coats of finish. Larger or open-concept spaces take longer, and humidity or cool temperatures can slow drying further.
Finish timing has three separate stages, and they're not interchangeable:
- Dry and recoat time: How long you wait before applying the next coat.
- Light-use time: When you can walk on the floor in socks and return furniture carefully.
- Full cure: When the finish reaches its full hardness, which can take considerably longer.
You generally don't wait for full cure between coats. Follow the schedule published for the finish you've chosen and keep pets and foot traffic off the floor until the instructions say it's ready.
Should You Sand Your Hardwood Floors or Replace Them?
Not every worn floor needs new material. If the wear is mostly surface scratches, dullness, or a dated finish, a recoat or a full refinish may restore the look. If boards are soft, warped, separating, or have been sanded so many times there's little wood left, restoration may not be a safe or lasting fix.
Choosing not to sand it yourself doesn't automatically mean replacing the floor, either. Professional refinishing is another option for floors that are good candidates but not good DIY projects. Cosmetic wear favors refinishing or recoating, while structural issues or thin wear layers point toward repair or replacement.
Choosing a Hardwood Floor Stain (or Skipping It)
If you like your floor's natural tone, you can skip stain entirely and move straight to sealing. If you want a color change, test the hardwood floor stain on a hidden spot or a matching scrap first, since different wood species absorb stain unevenly. Apply it in manageable sections with the grain, wipe off excess as directed, and keep a wet edge to avoid lap marks. Darker stains tend to highlight sanding imperfections, so thorough prep can pay off even more here.
Stain-soaked rags need special care. Lay them flat to dry or handle them exactly as the product's disposal instructions direct, never balled up in a pile or bin.
What's the Best Finish for Refinished Hardwood Floors?
There isn't a single "best" hardwood floor polyurethane for every home; it depends on your priorities. Water-based polyurethane generally dries faster and stays clear, which some homeowners prefer for lighter wood tones. Oil-based polyurethane often adds a warm amber cast and may take longer to dry between coats, which some people like for a more traditional look.
Apply thin, even coats in the direction of the grain rather than thick coats that can pool or bubble. Most floors need more than one coat for durable protection. Follow the finish manufacturer's directions for any light abrading, dust removal, and recoat windows between layers.
How Do You Remove Deep Stains from Hardwood Floors?
Deep pet stains, water rings, or dark discoloration can be tricky, since they may have penetrated further into the wood than normal sanding can reach. Pushing the sander deeper to chase a stain can weaken the board or expose fasteners, so it's worth knowing when to stop.
- If the mark lightens as you sand, continue through the grit sequence as planned.
- If it stays dark and widespread, consider replacing the affected boards.
- If boards feel soft or unstable, address that structural issue before anything else.
- If the floor has already been refinished several times, get an assessment from a qualified hardwood refinishing professional before sanding further.
Caring for Your Refinished Floors
Once the finish has reached the stage your manufacturer describes as ready, sweep or vacuum regularly with a floor-safe attachment and wipe up spills promptly. Check with your manufacturer for approved hardwood cleaners, since the wrong cleaner can dull or damage a fresh finish. Felt pads under furniture legs and mats at entry points can help reduce scratches and grit over time.
Deciding What's Right for Your Floor
Start by matching the fix to the problem. Dirt and residue call for cleaning, surface wear on a suitable finish may call for a maintenance recoat, and deeper wear may call for full refinishing if enough wood remains. If your floor is cupped, heavily damaged, thinly layered, or coated in older paint, bring in a qualified hardwood refinishing professional before any sanding begins. And if restoration just isn't the right fit, new hardwood may be worth a look.
Empire doesn't provide refinishing, but if replacement is on your mind, homeowners in Empire's service areas can schedule a FREE in-home estimate for replacement flooring. A flooring professional will bring samples to your home and walk you through the selection of hardwood and wood-look flooring Empire carries. And if you'd like more care tips and inspiration, the Inspiration Center blog has plenty more to explore. For a closer look at a related topic, try Refinishing Hardwood Floors 101.
