The floor
... mostly consisted of p... yellow pvc, a similar colour to the one of the kitchen surface.
Both of us knew from the very beginning that we were going to get rid of the pvc floor. Unfortunately it was sticking to the concrete like chewing gum which we had not realised before. Though Juergen was using special scrape tools he sometimes had to whittle it off the floor with a small utility knife in the most used areas (see arrow).
(one mouse click on the picture shows the respective original photo)
But the result was worth the work: