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Discussion Starter · #1 ·
I have a similar problem. My house is a beach house, built on 8' pilings. The area under the house is open. Yesterday was hot and humid and we had the A/C on. I noticed some condensation on the exterior surface of the brownboard under the house today that corresponds to where the HVAC duct work is located. WHat would cause this and what is the solution? I questioned the insulation of the ducts when the builder was enclosing the ducts (I didnt think there was sufficient insulation around the ducts) but the builder blew me off. Is this what is causing the problem?
 

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Discussion Starter · #4 ·
The joints were taped and covered but when they were wrapped with insulation they did not form a complete wrap as far as I could tell. I suspect the shoddy unsulating is what is causing the problem now.
 

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Discussion Starter · #6 ·
Thanks so much. The home is still under warranty and this is one I am going to fight on, for what it is worth. But I am prepared to tackle it myself if I do not get any satisfaction from him.

On another note, the brownboard will eventually break down with the elements and someone suggested pool paint over the brown board to protect it. It seemed like a good idea except that I wondered if the latex nature of the pool paint would act as a second vapor barrier and, if so, would that create an additional problem over time or would it be beneficial?
 
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