Finally finished skinning the beast!
After countless tubes of Sikaflex 252, several bottles of 205 and 210 primer, we have finally put on the last 0.063 aluminum panel! We decided to go with polyisocyanurate 2" insulation (R13) instead of using spray. One reason is the TSX-8500 is exposure rated for houses, easing some of the fire concerns vs spray polyurethane (which is probably just fine when behind panels). The other nice thing is the rigid insulation comes with aluminum facers that act as a vapor barrier. We are taping the seams with aluminum tape too. In the picture we have started putting in the foam in the floor. The walls will also have 2 inches of foam even though the studs are 1x1. There will be 1 inch of foam over the studs to provide a thermal break to the interior.
Finally feeling like we are getting somewhere. I still need to cut out the openings in the sides for the windows and hatch panels, but they are framed and skinned.
