Have 2020 TT call manufacturer about installing roof access ladder. Was told there was no backing to support a ladder. Also was advised not to walk on roof with out a backing board to walk on. My que...
My newbie single axle has standard 13.5 AC and a non-walkable roof, but that roof is a single piece of metal that spans from under the front cap all the way to the rear wall. I'll take it over a walkable TPO roof personally =)