Originally Posted by Evey_c
I don't really need to frame anything out since I'm buying everything premaden so I thought this would be easier than making new cuts and such? I'm totally new at this, so I was hoping this would be better. Cutting seems more difficult. Unless I'm not understanding you. Anyone have any personal videos/pictures of their work? I have search tirelessly on YouTube to see if anyone specifically documented this specific scenario.
Click on User CP at the top and edit your details, so that people here will know what kind of bus you have and where you're located etc. Don't know what type of bus you have, but it's common for the wall panels to be screwed (or riveted) to the ribs of the bus but also spot-welded along the top of the panel to the frame on which the windows sit. This spot welding makes the panels difficult to fully remove and impossible to put back exactly as they were.
Fortunately, you don't need to put the wall panels back and they can be easily removed by just cutting below the window sill (where the spot welds are). You can then just insulate between the ribs and put up plywood over it.