Walls and Ceilings - Knee Wall?

OK, here is my dilemma. I have made plans to knock down a closet wall to build in a bed. seems simple right? no, the catch... im not sure of this wall's purpose, is it a knee wall? It is about 4 feet from the outer wall. The wall continues the length of that side of the house, except for where the dormer is in the middle which is the hallway. it does connect directly with the roof, however, on the other slant of the roof on the other side of the house there is no supporting wall. The angle of the roof starts about 40 inches up the wall on the second floor. It is a very old house, if that helps, i think it might be post and beam style. Im not sure though. If it is post and beam does it still need this supporting wall (if it is a supporting wall)? Anyways, please someone inform me, ask any questions if im unclear.
thanks.

Hey welcome aboard!

Sounds like this could be a bearing wall, but need more info and or a picture of what you're talking about to say for sure. It's a closet wall, that runs the length of the room? Tell us as much about the construction style of your home as possible and if you could post a link to some pics of the situation it would be good.

If it is a closet it may not be a bearing wall depending on the location. But if you remove it and have a big snow it may collapse the roof. If you have plans you need to consult an engineer or have one come out and check it out. Worth the small investment to not have to explain to insurance company why the the structural support was removed.