Thought I'd start this thread to entertain myself for another week or so.
long Winter to think thru thus project so oldest give me any advice or knowledge you have
Even though my Sabre was advertised a heated and enclosed underbelly, it ain't...that's a whole different discussion and I realize you get what you pay for.
So what I'm thinking (and have spent time reading about) is to drop the coraplast cover, then remove the radiant insulating layer at least for a bit. I will then go they several steps before adding rigid foam insulation.
First, add pipe insulation in key areas and at least little sections to ensure the piping isn't resting on any steel framework. I'm also going to find a way to add shutoffs on the O.K. lines, but will have to see how to keep them accessible.
Second, consider adding heating pads to the tanks (obviously I'll hand to decide before starting this project)
Third, check all heating lines and ducts, adding small openings along the route. Not sure on this, but I'm thinking of making a "trap" or a couple induce cabinets that could access to blow heat into the belly also?
finally, after ensuring all wiring, plumbing, and ducting is how I want it, I will cover the sides, ends, and bottom of the underbelly with 1"(I think, maybe 2"?) Foam. Sealing all holes and miscuts with expanding foam as needed. Then I'm hoping to cover that with the radiant, but maybe that should be on top of the foam ?
Thoughts on this process? Think it'll solve my freezing up problems? we don't fulltime, but live in central Nebraska and like to use the rig over the Winter in place of hotels when needed and as added guest space.