Author Topic: Soundproofing air returns/plenums  (Read 3541 times)


  • Guest
Soundproofing air returns/plenums
« on: December 01, 2012, 10:18:02 AM »
Soundproofing Air Return Plenum. I have 2 air return plenums in my basement and they echo and vibrate something aweful. What can i do to sound proof them or at least stop the echo/vibration. I'll be decoupling the ceiling so that'll help but still. Also, they're nailed flush to the joists but is it ok to seal them to the joists as well so there's no leaks whatsoever.  And finally, can I take them down and install a layer of GG and DW against the ceiling then put the plenums back up?  Thanks. 

I'd attatch a picture but have no idea how....

Randy S

  • Guest
Re: Soundproofing air returns/plenums
« Reply #1 on: December 13, 2012, 06:28:36 PM »
You should line the ducts with our ssp foam mat 1/2" here is the link for this product.