I am unsure about the type of wood flooring to install and how it should be installed. I have a split level house, the space for the new flooring is slightly below grade. It's grade level in the front part of the house but in the back it is below grade by about 1.5 ft. I want to install real wood using an adhesive. The flooring surface is concrete. What type of wood floor should I use (floating- click and lock, or adhesive)? Depending on my options what is the best way to install? Do I need to test the moisture level for the floor before installing and how should I do that?