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    hooli's Avatar
    hooli Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Aug 10, 2010, 07:21 PM
    A/C duct condensation
    Condensation is forming on a wall of my attached garage in a very specific pattern following an a/c duct. The garage itself has no a/c, and the wall in question adjoins the interior of the house. There is no condensation in the interior space. Preliminary investigations on my part (ie: cutting out a 2 inch square in the drywall of the affected area) have revealed that there is no insulation between the duct and the drywall of the unconditioned space - in fact they touch each other. What do I need to do?
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #2

    Aug 10, 2010, 07:36 PM

    Only way to do it right is to tear out drywall and insulate the ductwork
    It will cost you much more later
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #3

    Aug 10, 2010, 08:27 PM

    What is the exact size of the duct?
    spanky917's Avatar
    spanky917 Posts: 42, Reputation: 5
    Junior Member
    		  
    #4

    Aug 11, 2010, 08:08 PM

    Moisture accumulation (condensation) is a function of cool meeting warm. Either insulate to stop migration of cool from inside the duct or "prevent the warm, moist air from getting to the sheet rock ? Sounds silly I guess but it's exactly how they keep metal buildings from sweating on the inside.
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