I've no experience of this so woud appreciate any input. Looked at a 40 sq/m floor this mornings of which 20sq.m or so is a mezzanine floor. Current flooring is 18mm wood installation sitting on thescreed. First thoughts were the movement / vibration I could feel when I jumped on the mezzanine area although I don't know if the wood flooring would exaggerate this? My adhesive of choice is Bal and I'm hoping that my local PST will come out and give an opinion / provide a spec but would also value any input from you guys. Maybe I am unduly concerned but my main query is how do you determine if such a floor is suitable to receive a tiled substrate.