Author Topic: Blocking Mass Transit Noise  (Read 5771 times)


  • Guest
Blocking Mass Transit Noise
« on: August 13, 2007, 02:55:55 AM »
We are contemplating buying a town house.  Directly behind are the Chicago "El" tracks, or elevated train.  We are trying to determine if the developer is planning to do enough to best reduce the noise.  Their plan is to pour sand into concrete cinder blocks, and then have a second outer layer of brick.  Do you have any suggestions or thoughts on that plan?  In case you are not familiar with Chicago, the El is the main public transportation train system, with trains running on elevated tracks.  Thanks!


  • Guest
Re: Blocking Mass Transit Noise
« Reply #1 on: August 17, 2007, 07:48:41 PM »
Well, having worked with and for developers, I can tell you they're not planning to go overboard on soundproofing.

The cinder block wall itself will kill a lot of sound, but only if it's painted on at least one side, preferably with several coats - fill all the little holes.  The porosity of the blocks negates their mass.  If the outer layer of brick is physically separated from the cinder block, that will be best. 

Of course, there's no guarantees living so close to such a loud source of noise....


  • Guest
Re: Blocking Mass Transit Noise
« Reply #2 on: September 05, 2007, 05:10:23 AM »
You will probably have to install soundproof windows which are laminate windows, installed behind your existing windows. So, two sets of windows. I just finished a blog entry on this, it includes several videos showing the effectiveness of this setup, video features trains and buses. There is also a list of suppliers.



  • Guest
Re: Blocking Mass Transit Noise
« Reply #3 on: September 08, 2007, 06:45:54 PM »
There is a great article on the web site of Multifamily Construction Advisory Committee if  Illinois titled "New Data Shows Masonry Wall and Precast Hollow Core Floor Systems Reaching High STC Ratings".  It shows various CMU/brick assemblies giving STC ratings.  Check it out to compare with the developer's proposals.  This article also gives excellent general soundproofing info.