Need physics lesson - bottom condensation

[g2outdoors]

All good info. Thanks OutandBack, that makes a lot of sense for us noobs.

[BillyBob58]

Hey OP, DQD.com, what did you end up doing? Any condensation problems?

[fallkniven]

My experience is that heat (warm vapor) rises. I have many experiences with frost on the TOP of my sleeping bag, inside the walls of a tent, and on the inside roof of my car when sleeping in it during one miserable "homeless" winter (I called it "adventure").
Paul

I don't know about you, but even in the summer time, I would get a lot of condensation that would build up in between my pad and the tent floor. On car camping trips, I would lay a beach towel in between the pad and tent floor.