This happened to me too.
Sims 4 roof inside house.
Make sure both pieces are the same width and height so that the ridge capping matches up.
My theory is that the game hasn t completely registered that your household lives in that house.
I tried to visit the house as a different household and it said to move in a household from the gallery.
The cross gable roof gives it the iconic shape we have come to associate with a traditional home and of course a higher ceiling which makes rooms feel a lot larger.
Make it so the gable ends are at the sides of the house.
So you ve built some l shaped stairs fit a roof on top of your house and decorated every inch with objects nestled in every corner.
The trim also protude into the house meaning you cannot have trim on the house when there is more than one level of roofing defeats the purpose.
Use the square or l shaped room units and push and pull into shape.
The walls going inside the house means that you cannot complete the trimming on the outside as simply as you could before as the corner shows inside of the room from original post.
The last thing to do is landscape.
In this the sims 4 tutorial i teach you how to build a functional attic that your sims can use including roof windows and a roof balcony.
If you find that you can see a roof section on the inside of your structure the first thing to do is check and see if you have a complete walled room unit without any breaks in it.
Add a second half hipped roof along the next side of the house overlapping the first piece at the corner.
The next thing to do is to place a room unit where you want the roofing to disappear.
Weather does not af.
Begin with a half hipped roof dragged out the full width of the house and porch.
Now pick the half gable tool and place it on the lower floor at the front with the slope of the roof matching the roof on the upper floor.
The wrap around porch and its roof is often seen on country homesteads.