Keep in mind. In the early days of Boler
production, condensation was apparently a problem.
If you have ever camped out in a trailer or a tent with condensation in it, that is not fun in my option.
Hence they chose to line the shell with Ensolite which helped stop that and gave a little protection from heat/cold transfer through the Fiberglass shall.
Mary picked up on the threads I was thinking of. There si still a similar product available like Ensolite.
And how is Roy in TO. We were thru there in 2011 on a cross Canada trip in our 17' Bigfoot
. I haven't been on the forum for quite awhile.