Hardwood Floors Too Thin To Refinish. If it is an engineered floor that is a different job and once again you need a pro edit here— on. It's about 1/4 inch thick and nailed straight through the plywood.
Hardwood floor refinishing and sanding is unforgiving work. The contractor says my hardwood floors are too thin to sand. By contrast, you can refinish most solid hardwood floors several times over the course of their life.
The wood needs to be sanded bare.
Need advice on wood floor refinishing? You can diy it or hire it done. Need advice on wood floor refinishing? Some are engineered with a veneer that may have been sanded already, and some solid wood floors may have simply worn too thin alternative: