Weather being what it is , I moved the foam for the trailer project back in front of my Studio sliding glass doors ... Just this alone adds significant insulation and prevents heat loss through this single pane glass ... Much warmer now !!! Turns out to be a great test of the 2" Blu-Foam ... Proving a trailer made of this should be EXACTLY like an Igloo ... a Good thing in extreme summer and winter ... won't take much to heat or cool ...
28F this morning here ... Studio was 58F before I turned the heat on ... Pretty good for sitting all night without heat ...
Checked out my Jayco FS , which is "supposed" to be insulated , but is not really .... 28F inside ...