When ductwork is touching it forms a very cold spot where they are touching thus condensation begins.
Condensation attic ductwork.
Dripping condensation may also lead to a ceiling leak which not only looks bad but also rots drywall and can cause your ceiling to collapse over time.
Over time condensation dripping from your ductwork onto attic insulation can cause it to compress which lowers its r value.
Let s say your ductwork is in your attic.
The 1 746 square foot house has r 19 insulation between the rafters and between r 15 and r 20 of rigid foam above the roof sheathing.
It can also feed mold growth and cause ceiling joists to rot and sheetrock to disintegrate leading to unhealthy air quality in your home and the need for costly structural repairs.
Occasional condensation on a c ducts is not a problem but keeping an eye on the situation is recommended.
Condensation on air ducts can be a serious problem.
Condensation forms when warm humid air comes into contact with a colder surface like your air conditioner s ductwork.
Persistent ductwork sweating may eventually lead to water damage.
Ductwork located in an attic must be hung properly so that the insulation can do its job.
Excessive condensation can also create conditions favorable to mold or mildew forming in areas surrounding the duct itself.
Condensation will begin to drip onto your attic insulation making it less effective at regulating temperatures inside your home.