How Many Times Can Hardwood Floors Be Sanded?
Every sanding takes a thin slice of your floor, and here is how to figure out how many slices are left.
Licensed and insured, and many years in business serving the greater Madison area.
The short answer
Many solid floors can take six to eight sandings over their life. Each sanding removes about 1/32 to 1/16 inch, a solid floor has a wear layer of about 1/4 inch or more, and sanding is not recommended below 3/32 inch (Hardwood Floors magazine).
Another trade source is more cautious, and it says a typical solid 3/4-inch strip floor has up to five sandings in an ideal case, and a skilled pro removes about 1/32 to 3/64 inch per resand (Wood Floor Business). Both agree on one thing: measure before you promise.
The formula
The Wood Floor Business article says to subtract 1/8 inch from the measured wear layer, then divide by 3/64 inch (Wood Floor Business). The wear layer is the depth above the tongue and groove on a solid floor, and the 1/8 inch is a safety margin, because the groove can begin to split once you get that close.
| Check | What it tells you |
|---|---|
| Wear layer | How much wood is above the tongue and groove |
| Nail heads showing | The floor has been sanded too far |
| Square-edge boards | Can often be sanded to within 1/8 inch of the subfloor if well fastened |
| Engineered wood | Wear layer about 1/16 to 1/4 inch, so fewer sandings |
Not sure how to measure? We do it at a heat register or a spare board edge, and read about refinish or replace.
Sanding-count checker: how many sandings are left?
Measure the wood above the tongue and groove at a floor register or board edge, then type it in, and the tool applies the trade formula explained below.
The rules behind it
- Solid floors: subtract 1/8 inch from the measured wear layer, then divide by 3/64 inch (Wood Floor Business).
- A skilled pro removes about 1/32 to 3/64 inch in a total resand (same source), so the tool also shows the 1/32 inch case.
- Engineered floors: wear layers run about 1/16 to 1/4 inch, and sanding is not recommended below 3/32 inch, or 2.38 mm (Hardwood Floors magazine).
Sanding Limits: questions answered
How many times can a hardwood floor be sanded?
Many solid floors can take six to eight (Hardwood Floors magazine), and a more cautious source says up to five on a 3/4-inch strip floor (Wood Floor Business).
How much wood does one sanding remove?
About 1/32 to 1/16 inch, or 1/32 to 3/64 inch from a skilled pro.
What is the wear layer?
The wood above the tongue and groove on a solid floor.
Can engineered floors be sanded?
Some can, but the wear layer is thinner, about 1/16 to 1/4 inch (Hardwood Floors).
What if my floor is too thin?
Below 3/32 inch sanding is not recommended, and see refinish or replace.
Does a screen and recoat use up a sanding?
No. It only scuffs the finish, and see screen and recoat.
Want your floor measured?
We check the wear layer before we promise a full sand, and send the form or call; see also the home page.