Re: Gabled roof clipping into room, how to fix this?!
@sinamuna You can among other things, pull the different arrows when the roof is selected, to change what part of the roof you extend. There are one round arrow for enlarging the whole roof piece, and another for just the outer layer, the arrow for that is more flat. If you press Shift and then drag that one, only one side of the roof is elongated.
Sometimes these things are just visible in build mode, not in live mode; so check that with a testsim.
If it is visible in live mode, and the resizing does not fit your vision, you can make a small room by the roof clipping, to encase it.
Let me know if I should post pictures.
Here is one guide on roof building, there are much more on The Official Sims Forum
https://www.carls-sims-4-guide.com/tutorials/building/roofs.php