Re: no flooring apartments
Try this. Use the point to point wall tool and trace the entire perimeter of the apartment and see if that you get you the ability to place flooring again once you close the room. You'll have to repaint the walls again and it might wipe out anything you have on those walls. It's best to do it when the entire space is empty before you draw in any interior wall but you should be able to do it with interior walls in place. You might have to redraw the interior walls too but since I've never tried it that way, Idk what exactly will happen. I ran into this a when I renovated one of the EH apartments and that was how I got it to work again.
What I think has happened is by bulldozing, the game is no longer seeing the space as a room so it won't let you place flooring. The ceiling might be gone too. For apartments, you can't change the apartment boundary walls so they stay when you bulldoze but they don't really make a room by themselves so you have to redraw them so you get a room that the game recognizes. Don't worry about the outside of the building if the paint changes. Clicking on it with any wall paint selected will restore the original paint. Or it will probably come back the next time you load the lot too.
Hope this helps.
