There is a wall in the HT that was not treated because it was an interior wall. The wall was completed so that at the very least, sounds outside the HT would not be heard in the room, and sound would escape into the area of the home where sound is a concern. An adjacent room was also used for storage. The home will be undergoing a more recently than expected remodel and the opportunity to treat the wall has become a possibility. Within the same concrete foundation is the wall that divides an entryway, and what will also become an equipment closet next to that. The entryway and the equipment closet are divided by another wall that was also left untreated. To access the closet one must go from the theater to the closet since having a door from entryway to the closet was not permitted.

The wall between the closet, entryway, and HT has no insulation, a steel door that does not have a solid core, and a standard interior door to the area that will become an equipment closet. The entryway next to it has a tile floor and a glass door. The ceiling in the HT is not drywall and sound escapes into the ceilings of the adjacent rooms within the foundation which were treated with insulation.

The primary concern is that the doors framing rattles. The door was sealed using painters caulk and the wall is standard treated wood 2X4 framing w/staggered studs and 5/8 DW on each side. Would filling the wall with blown insulation help to balance the mass of the wall and prevent the doors framing from making the rattle? The trim seems to be making the rattle. Would adding more nails into it help or is treating the wall the best solution?

After removing an outlet and using a glove and a kelly, I was able to pull out some insulation from the wall. It seems that the problem is not just including the framing of the door, which weather striping would help, and be less an eye sore than cardboard. The wall that is between the entryway and closet was not done using isolation clips. Does the wall need to be tore down to fix this?