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Soundproofing Forum Topics => Soundproofing your Condo, Townhouse or Bed & Breakfast => Topic started by: sbgagne on May 27, 2009, 08:56:46 PM

Title: Masonry common wall noise unbearable!
Post by: sbgagne on May 27, 2009, 08:56:46 PM
Can someone help point me in the right direction as to what I can do to remedy this problem.  I recently moved into a new construction townhome that has insulated masonry walls on the first floor and insulated staggered studs on the 2nd floor. THe master bedrooms on the 1st floor share a common wall and I can hear the neighbors talking through the wall (can't make out what is said) and can hear the bass from their surrond sound from the living room through the common wall in my master bedroom.  The home builders tech came out today and cut through the drywall the master bedroom only had concrete block firewall, with furring strips to mount one layer of drywall and some sort of aluminum heating/vapor barrier type insulation between the masonry and the drywall.  I thought there was supposed to be some other sort of barrier in between (MLV?) but I am not sure if that is upstairs or downstairs.  When I bought the place they had a cut away of the wall and it had a layer of thick black material in it.  I believe that was only been upstairs though.  I am going to have to check it out.  What are my options for deadening the noise? 
Title: Re: Masonry common wall noise unbearable!
Post by: Randy S on May 27, 2009, 09:34:37 PM
In order to reduce the LF (Bass) you will have to get back down to concrete wall and decouple the drywall with either SSP Clips and channel or build another wall. With clips and channel you will need to add an absorber to prevent a resonence chamber our 1/4 "SSP Foam mat will work well for this and add STC. With new framed wall you would use Cotton fiber insulation. All followed by floating 2 layers of drywall with Green glue sandwiched in between.
You can contact me direct if you would like to discuss more details.
Title: Re: Masonry common wall noise unbearable!
Post by: sbgagne on May 28, 2009, 08:54:05 PM
Thanks for the quick reply Randy.  If using SSP Clips and Channel then adding the two layers of drywall with the green glue in between would I need to take it completely back to concrete or can the SSP Foam be installed over the existing furring strips and reflective insulation/vapor barrier with the clips and channel on top covered by the offset layers of drywall with greenglue btwn.  The reason I asked is I would like to minimize the wall instrusion into the room as well as not have to reinsulate.

Thanks again.
Title: Re: Masonry common wall noise unbearable!
Post by: Randy S on May 28, 2009, 09:02:27 PM
if you mean apply it directly to the existing wall, Yes you can. It would be MLV w/psa Barrier first, clips and channel, 1/4 ssp mat then 2 layers 5/8" with Green glue in between.
We refer to this system as our retrofit decoupled ceiling system and works quite well. The only concern I would have is current resonence chamber that exists today between the concrete wall and the drywall...this should be filled or removed.
Title: Re: Masonry common wall noise unbearable!
Post by: janu08 on June 18, 2009, 06:03:45 PM
everyone generates some noise but for some of us, it can be an unbearable problem, ... The most common noise problems stem from neighbours on the other side of a party ... Sound insulating a party wall is the only solution when all else fails. ... masonry and we will talk about this issue in another article.