Quote:
Originally Posted by villagetinker
I recall reading an article about this subject, the bottom line was for maximum sound deadening you needed to have a double wall with alternating studs that do not touch the other wall, and as I recall they used fiberglass insulation that ran around the studs and between them. As for the blown in insulation, you can do this your self I have seen rental units and bagged insulation. I did this up North, I drilled 2 holes one at the top and one at the bottom. I put a screen on the top one and the insulation was blow in the bottom one. You could tell when the wall was full from the top hole. I would do this first and see if it provides enough sound deadening, if not you probably need the double wall approach. Hope this helps.
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Correct. There are even fancier methods for sound deadening between row houses, such as rubber foam matting. I believe one commonly used method is adding 5/8” Sheetrock to both walls, often sealed with non-hardening acoustic caulk (available at Lowe’s and Home Depot, as it is being used more and more in home construction).
You could try this:
440 SoundBarrier Controls Sound in Floors, Walls and Ceilings | Homasote
Check out this article from Fine Homebuilding. (You only get two articles free—after that you need to join.) The photos below are the whole article and are in line with what Village Tinker wrote. The author is a highly-respected builder and author.
Building Soundproof Walls - Fine Homebuilding