Author Topic: Sound barrier for abandoned flue opening  (Read 4005 times)

Cadman

  • Guest
Sound barrier for abandoned flue opening
« on: February 14, 2010, 02:45:57 AM »
Hope someone can help me. I'm on the 2nd floor of a 3-unit condo/townhouse and have a noise problem form my neighbor below me. I can hear his tv/stereo through the flue of our shared but abandoned fireplace chimney flue. The flue is no longer in use however a gas unit is installed in his fireplace opening and there is nothing in my fireplace except for a vent opening. In my unit I can distinctly hear tv noise and conversations through the vent opening. I've opened this vent and found that there is a hole in the floor about 1.5'x1.5'where the heating vent used to run through. How do I effectively acoustically seal this opening in the floor to provide a barrier for sound? Should I consider also doing something to the vent grille itself?

Thanksi n advance.

Randy S

  • Guest
Re: Sound barrier for abandoned flue opening
« Reply #1 on: February 15, 2010, 06:31:10 PM »
Seal it closed "Air Tight" , start there and if need be seal off the fireplace if its not in use anymore.
You dont need expensive products to seal this off.

Cadman

  • Guest
Re: Sound barrier for abandoned flue opening
« Reply #2 on: March 06, 2010, 08:09:52 PM »
Thanks for the reply. Sealing the floor opening "air tight" seems like the best solution - should i use plywood or gypsum board? Any suggestions as to which materials would be best suited for this application?

Randy S

  • Guest
Re: Sound barrier for abandoned flue opening
« Reply #3 on: March 06, 2010, 09:09:37 PM »
1/2" backer board....cement board...ie. Heavy....maybe 2 layers.

 

anything