Skip,
I'd check the insulation contractors for names. I think it's fairly common application for steel buildings. If it's possible to control the expanded film thickness, there are some resto applications that are intriguing.
There is open cell foam and closed cell foam and I'm not sure which does what, but one contributes to sweat rust more than the other. This is that "little info can be dangerous" deal we've heard about.... Anybody up to speed on this technology???
