The factory used regular pink stuff , mine doesn't have it or someone ripped it out ( I see some remnants of it over the sink). My old one never had it and I shoved some of that aluminum bubble stuff from home depot as far as I could between the walls. Didn't really seem to make much of a difference. So I don't think I'll bother with this one.
My plan is to move to where it's warmer whenever I feel cold anyway. (After the first of the year)
For some reason the 17 foot doesn't seem to get as cold as the 13 did ( we'll see next month)
Just turn on the electric heater/ or Mr Heater or Cat furnace
and enjoy camping.
For sleeping we use a nice cozy down comforter.
I thought about spray foam but it keeps expanding and could bow out the walls. The stuff that expands less may be better but you still have to deal with the odors any maybe nasty health stuff .
I decided not to do it.
guess if I could get it done and not use it for a year that could work. What am I crazy NOT use it for a year?
North Idaho for the winter? No way I'd try that. You need a Bigfoot
, good for -30 degrees.
If using the Burro
I would stack hay bales all around it for the winter. And dress warm and make some new friends in a real hurry, so I could crash in really bad weather.