Mold on Outside of Ductwork

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Discover why mold on the outside of ductwork is generally not a problem. Our expert will explain the reasons why mold growth on ducts is usually not a concern for indoor air quality. Learn more about the common misconceptions surrounding mold on ducts and what to look out for in case it becomes a problem. Get the facts and put your mind at ease with this informative video.

[@coryrush672]

That trunk line is made of fiberglass. It 100% has microbial growth in it. Either caused by duct leakage or from the air conditioning. You can cut into these the same as you would a pumpkin. Pull out the plug, take a picture looking down in each side. Then take your tape lift off the plug you just cut. The closer you get towards the air handler the more contaminated it will be. Replace your plug and mastic to seal shut

[@Specialized1993]

would this type of mold have to get removed or is it ok to leave as is.

[@CCCC-tq8yo]

Run