what is the best approach to installing a stud wall (making walk in wardrobe) without also screwing into the ceiling? I am going to pull back the carpet and nail into the floor but I am wondering if I can secure by another means instead of going into the ceiling as well. Thanks
Often walls in office buildings do not extend to the roof or floor above. (Suspended ceilings are installed in the offices.)
If the room is about 12’ or so with a double top plate, it probably doesn’t need to be braced. If it’s over 12’ or so, I’d add a 2x4 brace from the top of the wall up to the floor above.
If your walk in wardrobe has any corners or clothing racks spanning wall to wall, you will be fine if carefully constructed. Think about a backyard fence. Where the side fence meets the back fence, you have a very sturdy intersection. Another example is to think about a square/rectangular shaped room with no ceiling in the middle bigger room. You wouldn't even have to fasten it down for it to be relatively stable.