Re: Soundproofing walls in the duplex
Alex Gurevich
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For new construction, I’ve had success with foam insulation on both sides of the party wall. In fact, I have lived on one side and could not hear anything from the other side. However, I have used batts, and recently learned that they are the preferred product for sound proofing. Foam adheres to the frame members and reverberates the sound.
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Ofer Shahar
Soundproofing between rooms, especially in a duplex, is essential to ensure privacy and comfort. Here’s a guide to effectively soundproof the shared wall:
1. Decouple the Wall
• Why: Reduces vibrations that transfer sound.
• How: Use resilient channels or sound isolation clips to separate drywall from studs. This creates a gap that minimizes vibration transfer.
2. Add Mass
• Why: Heavier walls block more sound.
• How:
• Install multiple layers of drywall with Green Glue soundproofing compound in between.
• Use specialized soundproof drywall like QuietRock.
3. Use Absorptive Materials
• Why: Absorbs sound energy instead of letting it pass through.
• How:
• Fill the stud cavities with mineral wool insulation (e.g., Rockwool Safe’n’Sound) or fiberglass insulation.
• Avoid leaving gaps during installation.
4. Seal Gaps
• Why: Sound leaks through even small openings.
• How:
• Use acoustic caulk to seal gaps around outlets, vents, and where the wall meets the ceiling or floor.
• Install putty pads behind electrical boxes.
5. Consider a Floating Floor or Ceiling (if needed)
• If the duplex has shared floors/ceilings, consider adding a floating floor or suspended ceiling with resilient mounts for extra isolation.
6. Add Finishing Touches
• Install soundproof doors or use door sweeps and weatherstripping for existing doors.
• Add thick carpets or rugs to minimize floor noise.
• Use heavy curtains to block sound from windows if applicable.
Pro Tip:
If you’re willing to invest, consult an acoustic specialist to assess your duplex’s specific needs and optimize the solution. It ensures you’re meeting both your budget and desired level of soundproofing.
Would you like help estimating costs or sourcing materials?
On Nov 25, 2024, at 8:35 AM, 'Alex Gurevich' via InvestorUndergroundAustin <investorunde...@googlegroups.com> wrote:
Good morning!
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phil...@gmail.com
Alex:
Short of tearing out the drywall to insert more insulation, you can use spray foam in the walls. I did it once to a property I had in Kileen, and it worked very well. I used a local spray foam company to do it for me as I did not want to try it myself and make a mess. To much and the walls could bow out between the studs. Too little and it won’t insulate sound properly. Make sure they use open cell foam vs closed cell. Open cell foam is porous and is a better solution for sound insulation.
Good luck.
Phil Gustafson
From: 'Alex Gurevich' via InvestorUndergroundAustin <investorunde...@googlegroups.com>
Sent: Monday, November 25, 2024 8:36 AM
To: InvestorUndergroundAustin <investorunde...@googlegroups.com>
Subject: [InvestorUnderground] Re: Soundproofing walls in the duplex
Good morning!
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