Soundproofing a common wall is a relatively simple job that could be easily accomplished as a home DIY project. When soundproofing a wall you have to decide how in depth you wish to go. If you are willing to remover the existing drywall then you will get some remarkable soundproofing results. So your first task would be to remove the existing drywall. Once you have the wallboard removed, you would start by filling the open stud cavity with a sound batt insulation such as Rockwool (Roxul is a great brand) or you can use the bonded cotton insulation called Ultra touch. You will want to use at least an R-13 sound insulation. Once you have filled the cavity with the sound insulation you will then use a sound isolation tape that your will tape directly to the face of the wood studs. The isolation tape is going to provide sound isolation from the studs and the cavity from the new drywall layer. As soon as you have finished applying the Iso tape to the studs and any stud cross members, you would then staple or nail up a layer of the 1# per sq ft mass Loaded Vinyl (MLV for short) The MLV will staple directly to the studs with the staple penetrating both the MLV and the Isolation tape and attaching directly to the stud. We recommend that you overlap the seams of the MLV by at least 1” and then you would caulk the overlap as well as around the perimeter of the MLV membrane. As soon as you are confident that the MLV is sealed properly you would simply drywall over top of the vinyl with a layer of quality 5/8” fire code drywall. Remember to bring the MLV all the way to the floor and do the same with your layer of drywall. If there is a gap at the bottom of the MLV or drywall, sound will be able to transmit through the gap and essentially through the wall. Think of the sound like you would water and the soundproof wall as a Dam. You want your wall to be as water tight as Hoover Dam for the best soundproofing results. One detail that will help is to seal off any electrical outlets or light switches on this wall using our fire stop putty pads to seal off the electrical boxes. Many times electrical outlets and light switches are directly adjacent to your neighbors so if you neglect to seal these switches and outlets you are allowing sound to pass through the wall. Remember 1% of an air leak or a light leak equates to a 30% sound leak. Sealing the wall is imperative.
I hope this has been informative. If you have questions, please post then on this Blog. Thank you Bob O. Adios!
www.soundproofingamerica.us
e-mail bob@soundproofingamerica.com
PH (877) 530-0139
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