Q: I have plans on installing 3/4 inch hardwood flooring over 5/8 inch OSB subfloor. Would this be okay? If not, why not? Also, if not, what should I do to correct this aside from pulling up the entire subfloor?
A: Floor manufacturers are saying OSB is OK to use. However, the 5/8 I don’t like. I would bump it up with at least 3/8 plywood.