I'm finishing our attic and I can't quite figure out the best approach. The house came with the attic already "framed" with a knee wall, but the studs are just just angled directly into the rafters like this.
As you can see, there's no top plate of any kind. My understanding is that you need a continuous surface to attach the drywall, so I need a top plate for the knee wall and a bottom plate for the ceiling wall. Or is that overdoing it? If so, what prevents the drywall from cracking at that seam?
We've already done one room by cutting a short top and bottom and toenailing them in between the knee wall studs. As you might imagine, this is very time-consuming and frankly doesn't look great. I don't want to rip them out a build a whole new wall because I'm not 100% confident that none of them are structural. I've considered just building a new frame on top of the existing studs with a whole new top and bottom, but that also seems like overkill (and complicates insulation).
I tried researching this elsewhere, but all the discussion I found centered whether to bevel the top plate when you build it new. I never found any discussion one way or the other on a bottom plate for the ceiling wall. Do you generally not attach the bottom edge of the drywall to anything?
So what's the best way to approach preparing this wall for drywall?