reply to John97
Re: Looking to install some type of floating floor over concrete
We replaced some some old wood paneling with drywall on the lower walls, and put in the new base trim, so the floor was all put in first then the base trim after. The guy spent some time sanding of bottom of the trim with an electric sander to try to match some of the dips/slopes in the floor. Turned out pretty well all around without having to do the quarter round.
small gap to the left of corner, had to take off ~1/4 inch to get it as is