Hardwood Floors: When to Refinish vs. When to Replace
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There comes a point when every hardwood floor owner asks the same question: is it time to refinish, or is the floor actually done? It's a fair question, and one your installer wishes more people asked before throwing a new floor on top of an old one.
The thickness rule
Solid hardwood can usually take four to seven sandings over its life. Each sanding takes about a sixty-fourth of an inch off the surface. If your floor has been sanded twice already, you've still got room. If you don't know its history, look at any place a board has been cut for a heating register or transition — you can often see the thickness of the wear layer above the tongue.
Engineered floors are a different story
Engineered hardwood has a thin veneer of real wood over plywood. That veneer is typically 1 to 4 mm thick. Most engineered floors can only handle one careful sanding, and some can't be sanded at all without exposing the plywood below.
Signs you can fix vs. signs you can't
A refinish handles surface scratches, dullness, light cupping, scattered dents, and pet stains that haven't soaked through. It will not solve:
• Boards that flex underfoot — that's a subfloor or fastener issue
• Wide gaps that come and go with the seasons — likely an acclimation or humidity issue
• Squeaks that move when you walk — fastener loosening
• Water damage that's blackened the wood through to its core
What this means for you
If your floors look tired but feel solid, you're almost certainly a refinish candidate, and that's a fraction of the cost of replacement. If anything underfoot feels off — bounce, give, a squeak that moves — pause before pricing new flooring. The problem might be under the floor, and a new floor over the same problem will give you the same complaint in a year.
What contractors should know
The honest conversation with a homeowner is usually faster than the sales pitch. Pull a register cover, photograph the wear layer, and explain what you see. Customers who understand the "why" make better decisions and refer better than customers who feel sold to.
Before you call anyone out
If you're not sure whether the work was done right, the cheapest first step isn't a contractor callback or a paid third-party inspection — it's a documented second opinion you can refer back to.
**Supervisr's Flooring QA model** follows industry standards and guidelines set forth by NWFA, ASTM (F710, F1869, F2170 moisture testing methods), and the major flooring manufacturers. It can review flooring installation photos for subfloor flatness, moisture documentation, acclimation conditions, fastener pattern, and expansion gaps. Upload photos of moisture readings, subfloor flatness, acclimation conditions, fastener pattern, and expansion gaps, and you'll get a documented evaluation back in minutes with citations to the specific standards involved. It's the same checklist a careful inspector uses — applied to your photos, on your timeline.
For homeowners, that documentation is your conversation-starter with the contractor (or, if needed, your insurer or warranty carrier). For contractors, it's the third-party verification that closes the conversation cleanly.
About Supervisr
Supervisr is an AI quality-assurance platform for residential flooring installations. It follows industry standards and guidelines set forth by NWFA, ASTM, and the major flooring manufacturers, and analyzes photos of subfloor prep, moisture documentation, and finished installations to flag issues against those published references.
Homeowners use Supervisr to verify a contractor's work without playing inspector themselves. Contractors use Supervisr to document quality at each milestone — protecting against warranty disputes and building a track record of verified work. For more on how Supervisr's QA model follows the published references for Flooring installations, visit supervisr.com.