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Old 10-30-2011, 02:24 PM   #1
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Ceiling Drywall, Wall Wet with Mold (from duct)


This problem I have been ignoring for years but now want it repaired. I live in South Florida and have water damage on the ceiling of my den about five feet from the ac vent. I removed much of of wet drywall and ceiling insulation and noticed one of the AC metal junction boxes is sweating and dripping where the mold wet drywall is. I went up into the attic crawl space above this room and noticed the flexible duct that hangs by these black straps leads to this metal junction box. The strange thing is that I don't see any`insulation around this metal box. Should there be insulation around it? The home is 14 years old and was built by a good builder ( Divosta ). Can I go to home Depot and buy some insulation and wrap this thing - not sure what to buy though. Lastly, I don't know a damn thing about home AC systems -I'm sure you can tell. Thanks!


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Old 10-30-2011, 02:42 PM   #2
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Ceiling Drywall, Wall Wet with Mold (from duct)


PM--I added to your title----HVAC guys don't care much about drywall----But ducts?

Ah,there are lots of duct hunters in that crowd.--Mike---

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Old 10-30-2011, 07:35 PM   #3
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Ceiling Drywall, Wall Wet with Mold (from duct)


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Old 10-30-2011, 07:45 PM   #4
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Ceiling Drywall, Wall Wet with Mold (from duct)


I took a few pictures and took another look. Seems like there is a aluminum bracket supporting an insulated box that connects to the flexible duct tube. You can see on the insulated box the condensation.



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Old 10-31-2011, 05:26 AM   #5
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Ceiling Drywall, Wall Wet with Mold (from duct)


Thanks PM--We'll get an HVAC pro eventually!! That sure is causing some damage.
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Old 10-31-2011, 04:16 PM   #6
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Ceiling Drywall, Wall Wet with Mold (from duct)


Well, just had an AC tech guy here. He said that the insulation around the flexible duct work and the duct box look fine. He said that there is way too much humidity in the attic. I live in South Florida and it is extremely humid rid now. He suggested that I block off some of the soffit vents that go around the perimiter of the house. And also maybe not keep the temp of the house so cold. I keep the thermostat at steady 68. He said that once you lower the attic humitity you should see the condensation on the duct work gone. What you all think?
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Old 10-31-2011, 05:16 PM   #7
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Ceiling Drywall, Wall Wet with Mold (from duct)


Turn your thermostats fan switch to ON. Go up to that duct and junction and see if you feel air blowing out. if so, then the problem is that it is leaking cold air onto the surfaces around it, and cooling them off so that they sweat/condense moisture on them.

Restricting your sofits will do far more harm then good, such as making your attic that much hotter, and your A/C run that much longer.

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