Super Soundproofing Community Forum

Soundproofing Forum Topics => Soundproofing your Condo, Townhouse or Bed & Breakfast => Topic started by: Cadman on February 14, 2010, 02:45:57 AM

Title: Sound barrier for abandoned flue opening
Post by: Cadman 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.
Title: Re: Sound barrier for abandoned flue opening
Post by: Randy S 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.
Title: Re: Sound barrier for abandoned flue opening
Post by: Cadman 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?
Title: Re: Sound barrier for abandoned flue opening
Post by: Randy S on March 06, 2010, 09:09:37 PM
1/2" backer board....cement board...ie. Heavy....maybe 2 layers.