Reconnect leaky duct sections photo at left.
The connector in attic is leaking.
In addition to making a mechanically sound connection between duct sections sheet metal screws mechanical fasteners nylon tie strips we use metal foil tape to complete the seal on connected metal duct sections.
Then either glue in a proper 3 in to 4 in.
Most people assume this is caused by a leaking roof but that might not be the source.
As you might expect when the caulk eventually fails a trickle of water will leak through and drip down through the ceiling below.
If you have a finished attic you probably have kneewalls those short walls underneath sloped ceilings.
Fixing this issue can be less costly than replacing a roof but it should be addressed as soon as possible.
The easiest solution is to saw out the caulked joint removing about 1 in.
Areas where leaks have.
Of pipe two cuts.
The cure for these duct leaks is simple.
Vent humid air from kitchens and bathrooms to the outside instead of the attic to avoid this problem.
Attic condensation is due to humid air leaking or vented into the attic.
Pvc coupling or insert a 3 in to 4 in.
Water found in these places is commonly caused by condensation in the attic.