Ok I was able to fix it up by welding and such (took forever). The problem now however is I have this weird line running down the side of the house. I used STL check and its definitely there. I checked to see if there were 2 vertices on top of each other but nothing. Edges are fine and so is everything else. I used the CAP…
It feels like your geometry has gone a bit wonky. Maybe there's some double edges, some unwelded vertices that kind of things. If you apply the STL modifier, it might give you some impression if this is the right direction! Hope this helps!