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5 feet x 2 inches x 2 inches gap to fill
Old 19th January 2013
  #1
Gear Addict
 
๐ŸŽง 5 years
5 feet x 2 inches x 2 inches gap to fill

Hello, I have windows about 5 feet tall that extend into the next room. There's a bit of space cut about 2 inches into the wall, and this slit is about 2 inches wide also. Sound leaks between the rooms very loudly and I would like to plug this cutout and perhaps leave a bit of air on the other side of the plug.

What should I compress into this cutout to block sound from traveling through?

Thank you
Old 20th January 2013
  #2
Gear Guru
 
1 Review written
๐ŸŽง 15 years
Block

I don't fully understand the verbal description. A photo would be great.
Blocking airborne sound requires mass and airtightness.
Layers can be bonded together with the likes of Green Glue to some advantage.
Suitable material? MDF, CementBoard, Plasterboard. Silicone Caulk for the airtightness.
DD
Old 20th January 2013
  #3
Gear Addict
 
๐ŸŽง 5 years
Sorry, here is a picture. http://i47.tinypic.com/16axyqs.jpg

It extends upwards about 4 to 5 feet. What I meant by leaving air on the other side was that if I stuff the whole crevice, I'll leave some space at the back rather than cramming it deeper. I assume the air barrier would be more effective?

Thank you for the recommendations. I'll look into them, but cannot use caulk on these walls. Are there any impermanent expanding foams I could use between the boards and the wall (and window on other side)? Could sound still be completely blocked? The room is host to a loud practicing R&B singer.
Old 21st January 2013
  #4
Gear Addict
 
Avast!'s Avatar
 
๐ŸŽง 10 years
Wrap a five foot 2 x 4 with .125 rubber and jam it in there.

You're welcome.


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