Originally Posted by nealtw
Welcome to the site.
We see more people installing wood over concrete now. What questions should a salesperson ask before making the sale.
The first questions you should ask concern height tolerances.
To install nail down 3/4 inch solid, a sub-floor needs to be installed to nail to.
I prefer in a residential install to put down a thin layer of foam as is used for a floating laminate floor. Over this I lay 4 by 8 sheets of 3/8th's inch plywood parallel to the walls and staggered so the seams don't match up. I then add a second layer 45 degrees to the walls which is also staggered. I then use 5/8 inch pin nails with my brad air nailer and generously nail these two layers together.
The result is a 3/4 inch plywood sub-floor the size of the room which is floating.
Using short staples or cleats I can then any solid wood floor of my choice.
The problem with this is the inch and a half gain in thickness. You need to ask about door clearances, and transition problems which may or may not be able to be resolved with this thickness. Also the added thickness may cause issues with the dishwasher, free standing range and space over the refrigerator.
If there is not a way to resolve it you may have to go with a floating click together, a glue down engineered floor or a glue down parquet.
Moisture in the concrete is also another issue that you need to ask about.