Anyone do anything to soundproof any of their interior rooms? Specifically anything with mass loaded vinyl acoustic barrier?
We'd like to soundproof the wall between a bedroom and the greatroom. We have 3/4 vmatch (pine) on the outside, 2x4 studs with 3 1/2 fiberglass batt betweent the studs and will then have another layer of 3/4 vmatch on the inside. We've thought of adding a 1 lb strip of MLV http://www.soundisolationstore.com/mass-loaded-vinyl-mlv-1-lb.html between the stud and the vmatch, but just curuious if anyone has had any experience in doing this.
If not, anything else to try and keep the noise down in your place?
We are doing the same thing right now, but it is in the lower level.
We commented to eachother that we also need to insulate and seal the
joists above the ceiling before we finish it - and maybe the ceiling.
I think you'll find Glenn's advice about doubling the dry wall if feasible would be better then spending money for the super sound insulating material. The sound actually transfers through the attachment of the 2 x 4 to both walls so putting wall board on the studs then the finish boards helps to dampen it. If you were to be fanatical about it you use 2 sets of slightly offset outward studs (only touch one wall) with one wall attached to one set and the other wall to its own set thus no interconnection.
Kind of reminds me of the first cell phones. Two soup cans with a string in between. You want to eliminate the string.
Back to reality. Make sure you consider the door and ductwork. Sound sneaks around looking for any escape route. A solid door with a seal on the bottom really helps. You can line the duct with sound absorbing foam and/or provide each duct with its own chase rather then T in to one common duct.
Unfortuanetly those great looking tongue and grove, second floor, 2 x 6 pine floors love to transmit sound down to the ceiling underneath. Only carpeting seems to help that problem.
We have had decent luck on floors with AcoustiGuard products from Ontario. Their 1/2" thick mat material is glued down and the finished floor is glued whenever possible. Sound travels thru nails and screws. The fewer the better. The double 2x offset stud wall addresses this issue.
The sprayfoam products on interior walls are great. And cost can be spread out when they come and tighten up rest of home (crawl space, attic, cricket roofs, gable ends, dormers, etc.).