Hello, our house has a/c ducts in the attic and separate ducts for the furnace that come from the basement. We live in Denver, and whenever it snows, water drips from the a/c ducts. A roofer and another repair man have looked and can find no roof leak. They both say that condensation is occurring inside the a/c ducts, from the heated air in the house hitting the cold metal ducts. And they both have no idea how to fix it, short of getting rid of the ducts (which would require purchasing a new a/c).

Any suggestions or insights on how we can stop the leaking? The ducts have exterior insulation.

Thanks!

Try insulating your ductwork

Thanks for the tip about insulation. We do have the ducts wrapped with insulation, but perhaps we need to apply more?