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I agree with you BillyBob, I would have thought the pad would do better laying directly on it, but you never know because it is an insulated vapor barrier and I wouldn't be surprised if multiple...

BillyBob,

I think staying warm at those temperatures means what he had didn't have any issues with air gaps. I suspect he had enough insulation between the bottom silnylon to fill it all in with...

You don't get those in Panama City?:D

That's alright, they would melt in Panama City in July.