[RossK08]

I just noticed this build-up near the air ducts (it's dry to the touch and I don't have access from the attic). I am aware of some condensation in the ceiling above it. Is this related to the condensation or a different issue?

Thanks

 

[finisher65]

Is it soft & powdery or hard like drywall mud?

 

[RossK08]

Is it soft & powdery or hard like drywall mud?

It's hard

 

[finisher65]

Looks like the drywall finisher wiped his knife on the cornerbead leaving that build up of mud & it was left that way.