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-   -   Sweating A/C ducting making crawlspace damp (http://www.diychatroom.com/f17/sweating-c-ducting-making-crawlspace-damp-150681/)

KJG 07-18-2012 09:40 AM

Sweating A/C ducting making crawlspace damp
 
Planning to replace the existing vapor barrier in my crawlspace (6mil plastic on sand/dirt floor). While inspecting the space I had to crawl thru small puddles of water on the existing plastic. The moisture was coming from sweating insulated flexible A/C ducting. It was a hot & humid day, and the space is unconditioned. The hoses did not feel much cooler than anything else in the crawlspace, but all of them were dripping (there are a lot of them).

Are the insulated ducts not insulated enough?

What, if anything, can or should I do to decrease the amount of water accumulating in this space? I am not considering encapsulation.

TarheelTerp 07-18-2012 11:05 AM

Every time this topic comes up differing views come up too.
http://www.rlcengineering.com/csfallacies.htm

danpik 07-18-2012 12:10 PM

The moisture is already in the crawlspace. The cool ducts are causing it to condense out and drip off the ducts

KJG 07-18-2012 01:38 PM

Quote:

Originally Posted by danpik (Post 968821)
The moisture is already in the crawlspace. The cool ducts are causing it to condense out and drip off the ducts

I guess my question is whether there is a feasible/reasonable way to increase the insulation around the flexible ducting so the moist air won't make contact with the cool surface & condense into a mini rain forest?


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