Roof Question

[Topgun919]

Whenever I add a new floor, the roof is added, but i am unable to delete it when I have no walls or foundation below it. I deselected both options that are presented when you add a new floor. It is probably something that I am missing...

[Delta-9]

Its how the very first floor acts, for some reason. To avoid this, I add all floors from the start.
It can make things a little hard to see, for the 3rd and 4th floors, as there is no "roof" on the floor below. But, you dont end up with a foundation you dont want.
When you first build your 2nd floor, you have to keep in mind, what the 3rd floor may "do". So, you want a terrace on the 2nd floor. For it to work, you have to make sure that your build, doesnt allow for 3rd floor foundation above that terrace.
https://steamcommunity.com/sharedfiles/filedetails/?id=1560569376

As you can see here, The terrace is on the 2nd floor, and the 3rd floor has no foundation above it. So, you have to strairstep the terraces. If you want them to look like that loading screen in game. And, if you want grass, and plants, then you make sure the "floor", or roof from below, doesnt have any foundation. No foundation= "outside".