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71
Thanks.

Is roxul comfortboard a good option for outside?

Is there a big difference between the 80 vs 110?
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Other Soundproofing Questions / Re: Basement ceiling soundproofing
« Last post by Randy S on August 29, 2017, 03:32:59 PM »
Bill,

You can use fiberglass since you are doing minor soundproofing..Mass is what you need and as much as you can put in..

you need to at least double the weight to see a 5db drop (40% of human speech) the more the mass the better the reduction.

The channel allows for complex structure and improves basic direct applied systems.

Randy S.
   
73
use roxul or therma fiber or even cotton fiber would be best bang for buck.

Randy S.
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Other Soundproofing Questions / Re: Basement ceiling soundproofing
« Last post by martin1b on August 28, 2017, 06:48:14 PM »
Thanks for the reply Randy. I'm on a budget and am trying to stop sound transmission between levels, such as talking. I can clearly hear conversations in the floor above me. Impact noise would be a bonus but not required.

To do this, would be GG/DD be the best way? RC and 1 sheet is doable and probably less expensive than GG/DD but does that only stop impact noise?  Also, how much insulation should I add AND can I use fiberglass insulation?

Bill
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Other Soundproofing Questions / Re: Basement ceiling soundproofing
« Last post by Randy S on August 28, 2017, 05:21:21 PM »
you most definitely need to insulate, do not leave the cavity hollow.

if you do not use channel then you want to go with 2 layers of 5/8" type X drywall with green glue.
you have to get the mass up in order to reduce air borne noise.

with out channel you do not get impact or low frequency reduction.

Randy S.
760-752-3030
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Other Soundproofing Questions / Re: Basement ceiling soundproofing
« Last post by martin1b on August 27, 2017, 10:31:22 PM »
OR do I forget Roxul or insulation and go with green glue and double drywall (1/2). Price would be comparable to Roxul.
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Other Soundproofing Questions / Re: Basement ceiling soundproofing
« Last post by martin1b on August 27, 2017, 08:41:27 PM »
Should I use Roxul or fiberglass insulation to drown out sound between levels?
78
Other Soundproofing Questions / Basement ceiling soundproofing
« Last post by martin1b on August 26, 2017, 10:57:05 PM »
I'm in the process of finishing my basement and want to prevent sound from going between the basement and upstairs. My primary concern is hearing talking, music or TV upstairs when played downstairs or kids screaming.

The basement is a pretty open design and am wondering if that will hamper any sound deading work I do. Also, I'm concerned about sound from the stairs passing down.

My joists are 20.5 apart and the cavity is 18" deep. I was considering r30 insulation, or Roxul S&S. Also was considering Type X drywall on the ceiling. Im not interested in using resilient channel as my ceiling is low already and I'm a tall guy. Every inch of ceiling height counts for me.

Any thoughts on my approach?
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Hi

How good is 2lb spray foam vs fibreglass vs roxul for sound insulation?

Looking more to deaden low freq vibrations...


Thanks
80
Goatdan,

This is very achievable by doing some out of the box applications. I need a lot of information in order to put this together for you.
Just rattling off suggestions would most likely create mistakes so it would be best to contact me direct so I can get specific details on the access points in the ceiling and discuss particulars of the project.

Reach me direct

Randy S.
760-752-3030
randy@soundproofing.org
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