Re: [A/S] Urethane Foam Insulation

[Charlie/Betty Burke <cbburke@xxxxxxxxxxxxx>]

The challenge with an Airstream is the all metal construction. Metal 
skin to metal rib to metal inner skin. Aluminum is a great conductor of 
temperature differentials. I've been in a new 1973 in 20 degree temps 
with frost lines on the inside of the coach. The biggest RV furnace they 
make can't make up for the cold transfer. Even the newer coaches with 
their transfer barrier are great. The barrier is only the thickness of 
compressed double stick tape.
I believe you will find RV's that advertise all weather capabilities 
have a wood frame structure. We used to own an SOB that we wintered in 
Conrad, MT. We saw -40 on several occasions. Wood construction along 
with storm windows made it possible for a 30K Btu furnace to keep us warm.

Charlie