I never built or re-built a TT but bought plans, modified slightly and built a TC. The walls were built individually on a large table except for the rounded front. First building the frame structure for the walls then nailing and gluing the interior panel on the structure. Once everything is installed the inside of the RV will be finished. The roof was placed on top of the wall frame. The individual panels are screwed and glued together Everything finished on inside first. The wiring, insulation is done from the exterior and then outside metal. Totally opposite of the procedure to build a house that is framed and finished on the outside first then wiring and insulating on the inside.
This is probably why the roof pealed back. The water damaged wood no longer would hold the screws holding it down.
