Can you refinish hardwood floors yourself?

Yes, on a solid floor with enough wear layer left, in a simply shaped room, if you accept that the first few square feet are where you learn. The two things that end DIY attempts are a drum sander dwelling in one spot and gouging, and discovering mid-job that the floor is engineered with a wear layer too thin to sand. Check the second before renting anything.

How long does it take to refinish hardwood floors?

Three to five days for a typical room set is normal: a day of preparation and rough sanding, a day of finer passes and edging, then a coat a day. That is the working time. The cure is separate and longer — light foot traffic after a day or so, furniture after several days, and rugs held off for two to four weeks depending on the finish.

How do I know if my floor can be sanded at all?

Pull a floor vent or a threshold and look at the board edge. Solid hardwood shows continuous grain and can normally take several sandings across its life. Engineered board shows a thin veneer over plywood layers, and if that veneer is around two millimetres or less, a full sand will go through it. That is the single check worth making before any other decision.

What grit sequence should I use?

Start only as coarse as the floor requires, then step up without skipping. A common progression is 36 or 40 grit to flatten and remove old finish, then 60, then 80, finishing around 100. Each grit removes the scratch pattern of the one before it, so skipping a step leaves marks that the finish then makes obvious under low light.

Why do professional floors look flatter than DIY ones?

Mostly edge work and finish application. The drum cannot reach the last few inches at every wall, so an edger does that perimeter, and blending the two so the transition is invisible is the hardest skill in the job. Finish application is the other half: keeping a wet edge across a whole room without lap marks takes practice most people get exactly once.

DIY vs Pro

How to Refinish Hardwood Floors, Step by Step

August 31, 2026 12 min By Rosenberg Flooring

How to Refinish Hardwood Floors

Refinishing is one of the few flooring jobs where a careful homeowner can get a genuinely good result, and also one where the failure modes are permanent. You cannot put wood back.

This is the actual sequence, including the checks that decide whether the job should start at all.

Before anything else: can this floor be sanded?

Pull a floor register or lift a threshold and look at the cut edge of a board.

Solid hardwood shows the same grain all the way down. A three-quarter-inch solid floor can normally take several full sandings across its service life, and most floors have some left.

Engineered board shows a thin wear veneer bonded over plywood or composite layers. The number that matters is the thickness of that veneer. Around two millimetres or less and a full drum sanding will cut through it, exposing the ply beneath, and there is no recovery from that short of replacement.

If the floor has already been refinished twice, or the nail heads are visible anywhere, treat it as out of material.

The preparation nobody photographs

Pull every staple and set every nail. A single proud nail head will tear a sanding belt and score the floor.
Deal with damaged boards first. Replacement and repair happen before sanding, so the new board gets sanded flat with the rest.
Seal the room. Plastic over doorways, tape the returns, cut the air handler. Sanding dust travels through an entire house otherwise.
Check the moisture content. A floor that is currently cupped from a moisture problem must not be sanded flat. It will crown when it dries. Find the source, fix it, wait for the readings to stabilise.
Note the finish type. Some older floors carry wax or shellac, and finishes do not always go over them.

Sanding: the grit progression

The principle is that each grit removes the scratch pattern left by the previous one. Skipping a step leaves scratches the finish will then highlight.

Pass	Purpose
36 to 40 grit	Flatten, remove old finish. Only as coarse as needed
60 grit	Remove the coarse scratch pattern
80 grit	Refine
100 grit	Final, before screening

Start no coarser than the floor requires. Coarse grit spends wear layer you cannot get back, and on a floor with one sanding left that matters a great deal.

The drum must always be moving. Lower it into a pass already walking, lift it before you stop. A drum sander left running in one place cuts a dish into the floor in seconds, and that dish is visible under every angle of light for the rest of the floor’s life. This is the single most common way a DIY refinish goes wrong.

Work with the grain, overlap passes, and keep the pace even.

The edges are the hard part

A drum sander cannot reach the last few inches against any wall. An edger does that perimeter, and it cuts in a rotary pattern rather than a linear one, which means it leaves a different scratch signature.

Blending those two so the join is invisible is the skill that separates a good refinish from an obvious one. It is done by matching grits step for step around the perimeter and then feathering the transition, usually with a hand scraper and hand sanding into corners the edger cannot reach.

Under a lamp at floor level, a poorly blended edge shows as a darker band running around the whole room. It is the first thing anyone in the trade looks for.

Screening, then dust

After the final grit, the floor is screened — a fine abrasive on a buffer — to unify the scratch pattern between the field and the edges.

Then the dust comes out properly: vacuum everything including walls and sills, let the air settle, vacuum again, then tack the floor. Any dust still airborne when finish goes down ends up permanently in the finish.

Finish, and what Gulf Coast humidity does to it

Water-based finishes dry fast, stay clear, and carry much lower odour. Fast drying is less forgiving of application errors.

Oil-based finishes flow out well, amber over time, take far longer between coats and cure much more slowly.

Both publish a temperature and humidity range for application, and Fort Bend County spends much of the year above the top of that humidity range. Refinishing here means running the air conditioning to pull the room down into spec and keeping it there through application and cure. A finish applied at high ambient humidity can stay soft, dry cloudy, or fail to harden properly.

Keep a wet edge, work in one direction, and do not go back over a section that has begun to set.

How long the whole thing takes

Working time for a typical room set is three to five days: preparation and rough sanding, finer passes and edging, then a coat a day.

Curing is separate and longer:

Light foot traffic: usually a day or so after the last coat
Furniture back: several days, and lift it rather than sliding
Rugs down: two to four weeks, because a rug traps solvent and prevents a full cure

Rushing the last item is a common and invisible mistake. The floor feels dry long before it is hard.

When to stop and call someone

The wear layer is thin, or you are not certain what the floor is
The floor is cupped, or there is any active moisture question
There is water damage, or boards need replacing
The floor is parquet, or a pattern, or already has a factory finish you cannot identify
The layout has many small rooms, closets and transitions, where the job is mostly edge work

Whether renting the equipment is worth it at all is a separate question, and it is worked through in renting a floor sander versus hiring a refinisher.

What we do

We check the wear layer before quoting, tell you plainly if a floor has a sanding left in it, and control the room’s humidity through application and cure rather than hoping the weather cooperates.

Call (281) 549-0305 or request an estimate in Rosenberg, Richmond, Sugar Land, Katy or anywhere in Fort Bend County.