Hardwood Floors: When to Refinish vs. When to Replace
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.
The part nobody can see later
Most of what decides how this holds up gets covered before the job is over. Once it is closed in, the only record of how it went in is the photos taken while it was still open.
Supervisr's Flooring QA model works from common industry practice and the installation instructions that ship with the materials. 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.
For a homeowner, that record is a straightforward way to understand what you paid for. For a contractor, it is the milestone documentation that stands behind a workmanship warranty years later, long after the crew has moved on to the next job.
About Supervisr
Supervisr is an AI quality-assurance platform for residential flooring installations. It works from common industry practice and manufacturer installation instructions, and analyzes photos of subfloor prep, moisture documentation, and finished installations to flag issues against those published references.
Contractors use Supervisr to document quality at each milestone — backing up a workmanship warranty and building a track record of work they can point to. Homeowners end up with a clear record of what went into their home. See how it works at supervisrapp.com.