My ac ductwork in the attic, round sheet metal, has gotten soaking wet from condensation. The AC contractor is coming out tomorrow to fix the low Supply Air and low cfm problem (the complete system is under warranty). The undersides of the duct are wet like a wet baby's diaper.
If there was any organic matter on the pipe or in the insulation before it got wet, that substance could mold. Eg. carrying the insulation out of the van setting on dirt/ground, setting it on dirty attic floor/other insulation, etc. Mold cannot thrive on fiberglass alone and it will dry out to retain the R-value. Hopefully they install a vapor barrier over the insulation after air-sealing the pipe joints with tape/mastic w. mesh tape. Mastic/tape the ends of the v.b./insulation to stop all warm outside attic air from infiltration to condense on the colder AC ducts. IMO, replace any showing sag/wetness to start fresh worry-free.
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17,000 dryer fires a year, when did you last clean the inside of the dryer near motor or the exhaust ducting?
Last edited by Gary in WA; 10-03-2013 at 11:00 PM.