Most people call us because a floor stopped looking good. Scratches, dull patches, a
gray cast near the patio door, a dark ring where a plant sat for six years. The question
underneath the call is almost always the same one: Can this be saved, or am I
buying a new floor?
The honest answer is that it depends on what’s left of the wood — not on how bad it
looks. Looks are the cheapest thing to fix. Here’s how to tell the difference before
anyone gives you a price.
The First Question is Thickness, Not Appearance
A hardwood floor can be sanded and refinished as long as there’s enough wood above the
tongue to take a sanding. That’s the whole test.
Solid hardwood is wood all the way through — typically 3/4″ thick when
new. That gives you a real budget of sandings over the life of the floor, which is why
80-year-old oak in a Livonia bungalow is often a refinish and not a replacement. Old floors
are frequently the best candidates, because they were milled thick and they’ve usually only
been done once or twice.
Engineered hardwood is a veneer of real wood over a plywood or composite
core. The veneer is what matters. A thick wear layer can usually take a light sanding,
sometimes two. A thin one — the kind common on budget click-together floors — can’t take
any. Sand through it and you’re looking at plywood, and that’s permanent.
core means engineered, and the thickness of that layer is your answer.
Laminate and vinyl are not wood and can’t be refinished at all. If you
have a printed photographic layer over a core, the only options are to replace or live
with it.
DIY thickness test: Pull a floor register and look at the cut edge of the
board, or find an exposed edge at a closet threshold. If you can see a thin dark line of
real wood over a layered core, that’s engineered — and the thickness of that line is your
answer.
Problems That Refinishing Solves
If the damage lives in the finish or the top fraction of the wood,
sanding removes it and you get a floor that looks new:
- Surface scratches, scuffs, and traffic lanes
- A dull, cloudy, or worn-through finish
- Gray or dried-out-looking boards from sun and time
- Light water spotting that hasn’t gone deep
- Wanting a different color — going from orange-toned to natural, or to a darker stain
- Old floors uncovered after carpet comes up, staple holes and all
Refinishing also costs dramatically less than replacement, doesn’t send a floor to a
landfill, and keeps the original material — which, with old-growth oak, is usually better
than what you’d buy to replace it.
Problems That Refinishing Does NOT Solve
Sanding takes wood off the top. It can’t add wood back, and it can’t fix anything
happening underneath:
- Deep cupping or crowning from water. Mild cupping often flattens once
the floor dries and can then be sanded. Severe, long-standing cupping — or boards that have
buckled up off the subfloor — usually means replacement, at least in the affected area. - Pet stains that went through. Black stains from urine soak into the
wood and into the subfloor. They don’t sand out. Those boards get replaced. - Nail heads showing, or boards flexing at the tongue. That’s a floor
that’s been sanded to the end of its life. One more pass and it starts breaking apart. - Engineered floors with the veneer worn through. Nothing left to sand.
- Subfloor or joist problems. Soft spots, movement, or floors over a
failing subfloor need the floor up regardless of how the surface looks. - Structural gaps everywhere. Normal seasonal gapping is fine and often
fills visually after a refinish. Wide, permanent gaps across a whole floor is a different
conversation.
An Answer People Forget: Partial Replacement
It isn’t always all-or-nothing. Damaged boards can be cut out and woven
in with matching material, and then the whole floor gets sanded and finished as one surface.
Done properly, you can’t find the repair afterward.
room of pet damage — without taking up the whole floor.
This is how a floor with a bad section gets saved for a fraction of a full replacement.
If someone tells you a water-damaged kitchen means the whole first floor comes out, get a
second opinion.
When Replacement Really is the Right Call
Sometimes it is. If the wear layer is gone, if the subfloor needs work, if the existing
floor is laminate or thin engineered, or if you want a different species or a different
board width, you’re replacing. That’s not a failure — it’s just the honest
answer, and it’s better to hear it before you’ve paid for a sanding that can’t help.
What an In-Person Look Tells You
A photo can’t tell you veneer thickness, and it can’t tell you what’s under a board.
When we come out, we’re checking the wood at an exposed edge, reading moisture, looking at
how the boards sit relative to each other, and finding out whether stains are in the finish
or in the fiber. That’s a short visit and it settles the question.
Refinishing is roughly four out of five jobs we do at Functional Floors. Dust containment
is the part homeowners ask about most: real sanding always makes some dust, and any company
promising otherwise is overselling — we run equipment we built ourselves for exactly that reason.
Not sure which one you’re looking at?
We’re here to help you get the honest answer for your floors. Estimates are free, in your
home, with no pressure and no surprises — call us at (313) 937-6009 — and refinishing is backed by our written five-year
finish guarantee.
Schedule a Free In-Home Estimate
Or visit our showroom at 16911 Middlebelt Rd, Livonia, MI 48154.
Frequently Asked Questions
Can my hardwood floor be refinished?
It can be sanded and refinished as long as there is enough wood above the tongue to take a sanding. That is the whole test — not how bad the floor looks. Solid hardwood is typically 3/4″ thick when new and has a real budget of sandings over its life. Engineered hardwood depends entirely on the thickness of its wear layer.
How can I tell if my floor is solid or engineered?
Pull a floor register and look at the cut edge of the board, or find an exposed edge at a closet threshold. If you can see a thin dark line of real wood over a layered core, that is engineered, and the thickness of that line is your answer.
Can laminate or vinyl floors be refinished?
No. Laminate and vinyl are not wood. They are a printed photographic layer over a core, so the only options are to replace them or live with them.
Will sanding remove pet stains?
Usually not. Black stains from urine soak into the wood and often into the subfloor, and they do not sand out. Those boards get replaced — which does not mean the whole floor has to come up.
Do I have to replace the whole floor if one section is damaged?
Rarely. Damaged boards can be cut out and woven in with matching material, then the whole floor is sanded and finished as one surface. Done properly you cannot find the repair afterward. If someone tells you a water-damaged kitchen means the whole first floor comes out, get a second opinion.
How much dust does sanding create?
Real hardwood sanding always creates some dust — any company promising otherwise is overselling. We run equipment we built ourselves for exactly that reason.
