I would think floating, the flooring needs room to expand/contract with temperature and humidity level.
My old listening in my old house had a Birch floor it was installed on a thin rubber mat especially designed for the purpose, your installer should be able to advise you.
Best of Luck
Peter
My old listening in my old house had a Birch floor it was installed on a thin rubber mat especially designed for the purpose, your installer should be able to advise you.
Best of Luck
Peter