Installing insulation to existing wall

[vinny186]

I live in a condo with an especially noisy neighbor. We share a wall that happens to be my bedroom and ever since she moved in, I've lost tons of sleep due to slamming doors, in fact I can even hear when she closes a dresser drawer.

I'd like to add insulation to the wall without having to remove all the drywall. I was wondering if anyone thinks it would be possible to add batts by cutting a 10 ft wide strip across the length of the wall at around 5 0r 6 feet off the ground and somehow stuffing it upwards and downwards to fill the area between the studs. I thought if I made the hole 6 to 8" wide, I could cut the batts into two pieces for the top and bottom.

I've considered blown-in but not sure it would do much for sound deadening.

 

[joecaption]

All your suggestions would be totally useless.
https://www.homedepot.com/c/ah/how-to-soundproof-a-room/9ba683603be9fa5395fab9089dadf23

 

[vinny186]

Insulation would have to be better than nothing which is what I have in the wall right now. If I did just two walls of soundproofing according to HD, it would be over 10 grand - somewhat impractical. I'm just looking to deaden the thudding sounds to some degree and if there is a way to do what I suggested or if someone has another method.

 

[Sparky617]

A second layer of drywall would do more than fiberglass insulation. Dense pack cellulose might help and could be blown in.

 

[Snoonyb]

Adding insulation, wouldn't stop the wall from vibrating and because of fire blocking, you'd need a second access.

Years ago, we'd hang decorative tapestries.