I have a two story condo that shares a common wall with a single story (vaulted ceiling) unit. I am going to be attempting some soundproofing on the common wall which is a staggered double stud wall. My plan at this time for the wall is to use Green Glue and 5/8" drywall.
My question is regarding the floor joist cavity area that abuts the common wall. The joist run perpendicular or 90 degrees to the common wall. I would like some opinions on what might be a good way to reduce the noise transmission in the area between the 12"-joists where the floor meets the wall, not sure of the spacing yet.
If I have to I can access that area buy cutting an opening in the drywall ceiling from below. I was think about caulking and batt insulation a foot or two of that area next to the common wall but after reading the "Sound Proofing with blown in insulation" thread it sounds like that might not be too effective.