
How to keep these ducts from squeaking while people walk upstairs?
The ducts squeak pretty badly when (larger) people walk upstairs. Its driving me insane since my work from home office is down here.
I'd like to add rubber between the duct and the joists, but that would be a huge pain, especially since I can't really access the top of the inner one. Would lowering the ducts a fraction of an inch be a bad idea? If not, I'm adding rockwool and sound absorption panels.