Stairs again...

The removing of the ceiling downstairs is anyway a major part of the issue often, since it decides not always to show the floor, but the ceiling of the floor below :)

edit: I actually went ahead and tried it:
1) draw a room downstairs and remove the ceiling, remove walls and put stairs
2) draw balcony and remove floor, remove part where stairs will be
3) put stairs (I had to add a room on the next floor to help me place them since I was missing the ceiling lol) I did remove that room afterwards

I think because of the fence and the stairs surrounding the entire room, this one is not as glitchy, I tried it, it didn't revert to original state when restarting the game.

https://i.imgur.com/mauBVkW.png

They go up and down, no problems...
I did not 'remove' the fence using b+ctrl though, I right clicked it, removed the entire side wall (hence, keeping the 'room') and then afterwards replaced the one missing piece of fence in the corner, maybe that helps?

I usually build many structures by using the room tool, the one without walls, that gives you a 3x3 room. In case of staircases I build the stairways, where they shall be, then I look for the room, I wanted to be cut out, and recreate this room with the room tool outside of the house. I do this for every floor in the house then, and store all those rooms on the outside. Then take all the stairs, I have placed, and put them out too, they will also be stored on the outside.
If I build a basement, and the house has a foundation, I use the platform tool to recreate the room, that needs to be cut out in the first ffloor/ground floor. Here the difference to the other rooms is, that I then will place it, and sink the platform intonthe ground, until it reaches the deepest possible state (that depends on the height of the foundation). Then I paint the sides of that minus platform to my likes, and place the first stairway from the basement, so that it can cut through the ceiling.
Now I copy all the fake rooms, that I stored on the outside of the house at the positions, the opened ceilings shall be. I lace them and cut the floor out. I then look, iff any friezes from the outside like to show up on the cut out places, and delete them one by one. I place the stairs starting with the lowest one, now in the other direction thatn the one from the basement - from the higher floor to the lower, until all stairs are placed. Afterwards I place fences and railings and add - again one by one - the wall panels from the second friezes menu to cover up the borders of the open space.
This sounds more complicated, than it is but it works for me. Only important thing is, to never build anything in this space afterwards again. A finished staircase is a finished staircase. If you change anything there, it can mess up the whole thing, and you possibly have to rebuild the whole thingie again. That is, why I copy the prepared fake rooms to their spaces, where they should be. I can easily do that as often, as I need to in case, I mess things up.

I´ve made a picture tutorial for this, and as soon, as I am allowed to show pictures in the forums, I will show this tutorial here too.

I think, the whole room concept centered building is very bugged, and there are a few solutions to get around that. The use of spandrels, @Xinqun , is indeed a good idea, I need to check that out.
@DeanXeL , maybe that is a difference then, I have all addons. And I am making heavy use of friezes and trims, and cause cutting out the floor does have an impact of how a room is recognized by the game, I usually have to fight against friezes on the inside walls, where my staircases are. The last big staircase - I needed roundabout three hours to get it to my likes. The rest of the house was easily done but a double staircase, that is only partially walled, in the entrance area with an open ceiling, combined with stairways into the attic and into the basement: I think, I understand, what Xinqun meant with the word "exploded" here...
That house was then the reason for me to document every single step there. And like I wrote, my description sounds much more complicated than the process actually is.

@DeanXeL , thanks, I kknow that, and I use that a lot. But it´s strange though, cause it says, that the rooms isn´t anymore a room but only something, that looks like one. And this bothers me. And I think, that is, what Xinqun meant with the word "exploded".
A staircase shouldn´t kill a room. And aside from the fact, that I can indeed destroy the friezes that way, it can happen, that there are some, that are really hard to recognize, and then they get in the way, if you want to place something else. And you search and search for the reason, and you can´t find it.
Also it bothers me, if it comes to wallpapers, as they also need to be placed as single ones, after opening a ceiling. I mean, I have to live with those problems but I don´t like them. Why this room tool, if it doesn´t work like it should? It was so much easier to build in the older games of this series, and the few advantages, Sims 4 really makes, are mixed up with bugs everywhere. That is too sad, cause I really like things like that platform tool, that is so useful, or what we can do with roofs nowadays.

I’m glad this conversation is still going. Hopefully more will give their input and EA might finally address these issues. This entire mess is one reason I really want proper 2x2 stackable circular stairs. They come with banisters and you don’t have to worry about knocking floor tiles out. Either way, this needs to be addressed.

Oh man, I do miss the original Sims where you could just like ctrl + drag a floor and have that piece disappear xD
I get that they need the rooms to define inside/outside for weather and whatnot, but I mean, a room does not even seem to count as an inside room anymore (roof clipping starts happening) when you add a fence that touches the wall or a platform or a room with half walls or no walls.... I wish we could just define our own rooms as inside or outside ... (I mean, bet we would all love to see a fenced deck where it remains 21°C even if it is freezing outside :p)

@DeanXeL , oh yeah, that is an idea indeed! But my way does the same job without any fences. As soon, as I am allowed to do, I will show my pictures. I think, that makes things more clear.

Hi @Metaphasic! I think that “L-shaped floor” under the second floor (first floor if you’re from the UK) is actually the lower floor’s ceiling. Assuming that you’ve already done the “workaround for the fence glitch”, I believe that removing the ceilings of the lower floor should get rid of those. :smile:

@orenjiAi hence my first 'easy' solution of removing the ceiling.. it is how I do it with basegame only.

However, Xinqun made the good remark that the ceiling of the lower floor only shows up if you have completely 'exploded' (deleted, un-roomed) the room you are working with. This means the room where the stairs are in will not react as a room to weather, friezes, trims and all those fun things. Hence the more complicated workarounds needed if you wish to keep the space a proper room... That's why the frustration with the room based building popped up here too :)