Foundation disappearing when building walls

@efa8ee9465c0a967 Hi! I'm hoping I'm understanding your issue correctly. Please forgive me if I am misunderstanding....

Looking at your screenshot I'm guessing that perhaps you made the area with platforms rather than the wall/room tool(s). For instance, in bb this is a square platform:

...and this is the room tool:

On the left you see if I built an area using a square platform to begin with, then using the wall tool to draw a wall. When I draw the wall, it removes the base of the platform. On the right is when I use the room tool to make a room:

There is some information here on building with the wall and room tools. Sorry, I haven't added a tutorial on building with platforms yet: https://sherigr.com/sims-4-building-tutorials/wall-and-basement-tools/

To raise the room (which creates a foundation) you click the a wall of the room to highlight it and a plumbob will appear in the center. If you drag the plumbob up two clicks you should see a foundation appear like this:

You can then add a different foundation type to the room, if you like:

You can also do this with a platform (raise it to make add a foundation to it):

...and you can then add a different foundation to the platform, if you like:


I hope there was something in here that helps with your question/issue. Please just ask me to clarify or let me know if the issue is not this.