Looking after wood floors in the desert.
Dry air, hard light and fine grit each attack a floor differently. Three habits handle almost all of it — and two common cleaning products will permanently ruin your finish.
Most wood floor advice online is written for temperate climates with wood subfloors and stable humidity. Phoenix has none of those things, and it changes what matters.
In this guide
1. Three forces, three different problems
Wood is a living material even after it's milled and finished. In the Valley, three things work on it constantly, and each does something different.
Very low humidity. Wood is hygroscopic — it exchanges moisture with the air until the two are in balance. In a dry, air-conditioned interior, boards give up moisture and contract. That shows as small gaps between planks, loosened joints, and in prolonged cases surface checking: fine cracks starting at the ends or along the grain as the top of the board dries faster than its core. It also makes the finish more brittle.
Intense UV. Sunlight breaks down pigments and finish resins, causing fading and ambering. Dark stains show the contrast fastest, and the effect is uneven, because rugs and furniture shade parts of the floor and not others.
Fine abrasive dust. The one most people underestimate. Desert grit settles on the floor and behaves like sandpaper underfoot. It abrades the finish, dulls the sheen, and exposes raw wood sooner than expected. Once wood is exposed it gains and loses moisture faster, which amplifies movement, which opens more joints for grit to sit in.
Which is why sweeping is the whole game
If you do one thing for your floor, do this one. Regular sweeping or vacuuming does more than any product on any shelf, because it removes the abrasive before it gets ground into the finish. Everything else in this article is secondary to it.
2. What to clean with — and what will wreck it
For a polyurethane-finished floor, which is most of them:
- Regular sweeping or vacuuming. The main event.
- Sticky spills: a damp cloth, followed by a dry, clean, soft one. Damp, not wet.
- Stubborn dirt: a glass cleaner will lift it.
And the list that matters more:
- Never wet-mop. Standing water finds the seams.
- No oil soaps, paste wax or acrylic dressings. They leave a film that dulls the finish, attracts dust, and complicates any future recoat — a new coat won't bond properly through a residue.
- Never diluted vinegar or ammonia. Both acid-etch polyurethane and leave it permanently dull. This is not grime you can clean off later; it's damage to the finish itself, and the fix is recoating the floor. It's also the most common bad advice on the internet, repeated everywhere.
Different finishes want different care. A wax floor is demanding day to day but unusually easy to spot-repair; a factory aluminium-oxide finish is exceptionally hard-wearing but can't be touched up on site. If you don't know which you have, we can tell from a photograph. More on finish types on the floors and finishes page.
3. Humidity, gaps and cupping
Some seasonal movement is normal and not a defect. Small gaps that open in the driest months and close later are the floor doing what wood does.
What isn't normal: cupping (board edges higher than their centres), buckling (the floor lifting away from the subfloor), or gaps that never close. Those mean moisture is coming from somewhere it shouldn't — a slow leak, a slab issue, or a floor that was installed without proper acclimation.
What helps: keeping indoor conditions steady rather than chasing a target number. Big swings do more damage than any particular humidity level, and the swings tend to come from HVAC being switched off during a trip or a remodel. If you're leaving the house empty through summer, leave the air conditioning running at a moderate setting rather than off.
4. Sunlight, and the outline where the rug used to be
Every Valley home with big windows eventually gets this: a floor that's one colour in the traffic lanes and another under whatever's been sitting still. It's not damage exactly — it's uneven ageing.
Three things reduce it. Move rugs and furniture occasionally so the change happens evenly rather than in rectangles. Use window film or shades on the elevations that take the worst of the afternoon sun. And when you choose a floor, remember that lighter, natural-toned oak drifts far less visibly than a dark stain, and a lower sheen hides what drift there is.
If your floor is already mapped out, a refinish evens the whole thing back to one colour.
5. Recoat early, sand rarely
This is the part that saves the most money, and almost nobody does it.
Because grit wears finish faster here, a Phoenix floor reaches "the finish is worn but the wood is untouched" sooner than a floor in a milder climate. At that point a screen-and-recoat — abrade the existing finish, lay a fresh coat over it — takes about a day per room, removes no wood at all, and costs a fraction of a full sand.
Wait until the floor genuinely looks bad and you've usually gone past it: scratches have reached bare wood, and now you need a full sand-and-finish. Every sanding removes wood, and the number of times a floor can take that is finite — strictly so on engineered flooring, where the wear layer sets the limit.
Recoating on a schedule is how a wood floor lasts decades. Sanding is what you do when you've missed the window, or when you want to change the colour.
6. If the floor gets wet
A supply line under a sink, a slab leak, a door left open during a monsoon storm. What you do in the first hours decides how many boards come out.
- Stop the water. Nothing else matters until the source is off.
- Move air. Fans and dehumidification, not heat. Heat dries the surface faster than the core and makes checking worse.
- Don't pull boards up, and don't sand. Wood that has swollen often shrinks back close to flat as it dries. Sanding a wet floor just gives you a thinner wet floor.
- Call while it's drying, not after. How much recovers determines the scope of the repair, and that's easier to assess and document while the floor is still open — which matters if it's going through insurance.
Written by the team at Olympic Hardwood Flooring, a family-owned hardwood studio and showroom in Phoenix, AZ, working across the Valley since 2012. Not sure what your floor needs? Send a photo of the worst spot — call or text (602) 535-1214.
Send a photo of the worst board
It's usually enough for us to say whether you're looking at a clean, a recoat, a full sand or a repair.
Ask about your floor- Call or text(602) 535-1214
- Emailrafal@olympichardwood.com
Care questions we get asked
What should I clean a hardwood floor with?
Sweep or vacuum first and often — that alone does more than any product. For sticky spills, a damp cloth followed by a dry, soft one. On a polyurethane floor, a glass cleaner will lift stubborn dirt. Avoid wet mopping, oil soaps, paste wax and acrylic dressings, which leave a film that dulls the finish and complicates any future recoat.
Is vinegar safe on wood floors?
No. Diluted vinegar and ammonia both acid-etch polyurethane and leave it permanently dull. The damage isn't cosmetic grime you can clean off later — it's the finish itself, and fixing it means recoating the floor. This is the single most common piece of bad internet advice we deal with.
Why do gaps appear between my boards in winter?
Dry air. Wood is hygroscopic: it releases moisture to the surrounding air and contracts. Phoenix interiors run very low humidity for much of the year, so small gaps opening in the dry months and closing later is normal seasonal movement, not a defect. Persistent large gaps, cupping or buckling are a different matter and worth a look.
Why does my floor look lighter where the rug was?
UV. Intense Arizona sunlight breaks down pigments and finish resins, so exposed areas fade or amber while shaded areas don't. Move rugs and furniture occasionally so the change happens evenly, and use window film or shades on the worst-hit elevations. A refinish evens out an already-mapped floor.
How often should a floor be recoated?
Sooner than most people think, because desert dust is abrasive and wears finish faster here than in milder climates. A screen-and-recoat while the wood underneath is still untouched costs a fraction of a full sand, takes about a day per room, and removes no wood at all. Waiting until the floor looks bad usually means you've already lost that option.
What do I do if the floor gets wet?
Stop the water, then move air across it with fans and dehumidification rather than heat. Don't pull boards up and don't sand a wet floor. Wood that has swollen often shrinks back closer to flat as it dries, and how much recovers decides how much has to be replaced. Call while it's drying, not after.
Floor looking tired?
Often it's a recoat rather than a replacement. Send a photo and we'll tell you which.