Sound Proof Wall Penetrations

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pjm226

11 posts

Geek

#237726 15-Jun-2018 09:41

Hi All

I'm looking to soundproof between bedrooms and bathrooms in my new house. Purpose to seperate master from kids, shower and toliet from kids bedrooms. Have sensibly located things to reduce what needs to be in/on the wall, have upgraded gib from 10mm to 13mm noiseline and planning to use internal batts.

However the issue is around electrcial boxes I need in the walls, any cheap ideas how to insulate them?

I've seen foam/putty pads online (youtube) you can install over boxes during framing but unsure about issues with fire codes and how effective they are. Anyone have experinece here and suggest cheap solutions?

Cheers

Fred99

13684 posts

Uber Geek
+1 received by user: 10018

#2038068 15-Jun-2018 09:58

https://www.gib.co.nz/assets/Uploads/GIB04-Noise-Control-Systems-Manual-5A04-ONLINE-20180216.pdf

Page 85 onwards.

pjm226

11 posts

Geek

#2041125 20-Jun-2018 15:04

Thanks for the help, but those pages (and document) only seem to discuss for dual wall frame rather than single. Does no one have a solution for single frame wall?

Wilko

62 posts

Master Geek
+1 received by user: 12

#2041210 20-Jun-2018 15:54

Page 86 of the guide mentioned is helpful. Place outlets so they are not back to back on opposite faces of the wall. If surface mounted outlets are not suitable, seal them with Soundseal sealant around the perimeter and make sure the insulation continues behind the outlet. It is also important that before fixing the gib board, there is Soundseal around the perimeter of the framing. Just remember there is no such thing as a soundproof wall, you should get a STC rating of 55. Not using Soundseal can reduce the STC by 20.