Sound insulation for existing apartment interior wall
My apartment has a common wall with a neighbor that has poor sound insulation consisting of a thin fiberglass batting. I can hear conversations taking place on the other side of the wall. It's got to be reciprocal, right? When this room was built above the garage, we had cellulose insulation blown into the exterior walls and ceiling. At that time I had no idea how bad the sound insulation was between the two apartments. The contractor said that they couldn't blow the insulation into the common wall because of existing fiberglass batting insulation in that wall. This became a detail that fell into the preverbal crack.
If cellulose insulation is not viable because of the existing fiberglass batting, is there a way of injecting under pressure a thick slurry consisting of some kind of natural fibrous material and perhaps lyme? This might be a very good sound attenuation material once it dries. My intuition tells me that a thick material injected under pressure from the top of the wall between the studs might compress the fiberglass batting enough so that the space between the studs becomes filled with this material.
Is there anything like this out there? Are there any other solutions that would address the interior wall space? Putting additional layers of sound attenuating sheetrock on the existing wall is not really viable because of an existing door and moulding that would have to be relocated.
Posted Wed, 08/21/2013 - 22:18
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