I apologize but my German is not good enough, I can speak Italian and English.
I need to install 100 mq floating parquet in a house under renovation. 50 mq Ground floor and 50 mq 1st floor.
I have already the parquet:
https://www.bauhaus.info/parkett/fertigparkett-eiche-geneva/p/24592525?q=fertigparkett

I would apreciate to explore also an option for the existing stair, if it can covered or made the same color.

On first floor will be installed on an existing industrial parket.
On the ground floor it will be a new floor.