Concrete floor, then insulation, then OSB boards

Hello

We bought an old house. The floor slab is already new.
We are now sealing it with V60.

On top of that, we want to lay 6 cm rigid foam boards and OSB boards on top,
and then laminate flooring on that?

Is that possible or am I missing something?

Thank you for your numerous responses

Hi! Walking is possible – it’s quick and cheap. Screed would take longer. Loose fill would be better for leveling out unevenness. Gypsum fiber boards would be somewhat better for sound insulation. I would prefer floorboards if the height works out – it’s also a bit more difficult. However, you have to like laminate........ Best regards, TomTom.