tent floors and moisture

so, how much moisture beneath one's thermarest is normal following a cool (0-4C) night with scattered showers?

I'm not sure if my tent floor has begun to lose its waterproofness or if all the moisture i find on the bottom of my thermarest is the normal effect of condensation. once i would have thought that cloths left on the floor of the tent would be dry in the morning but they are always damp.

thoughts and feedback?

thanks.

Firts camping trip with my new tent. Temps dropped to about 33 degrees F during the night (with no rain). I had moisture under my thermarest.

I keep remembering a statement from my "Concepts of Science class" instructor....."cold goes to warm".

Quote:

so, how much moisture beneath one's thermarest is normal following a cool (0-4C) night with scattered showers?

None in a really good tent.

A thin plastic vapor barrier will fix this problem.
Jim S

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