What are your typical material costs for building a subfloor over concrete for a SOG 3/4" hardwood installation? Do you build a floating floor or do you anchor one sheet of 3/4 cdx to the concrete?
Or are you doing glue down? What are your material costs in this situation? Do you find your labor increasing as a result of choosing one installation over the other? What method is the best? I've received contradictory advice on these subjects.

I'm thinking about adding Hardwood installation to my portfolio and wanted to know what I was getting myself into with regards to cost and labor. Any advice would be greatly appreciated