Author Topic: Soundproofing a common wall  (Read 10034 times)

lug

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Soundproofing a common wall
« on: May 10, 2012, 12:18:57 AM »
I share a common wall with my next door neighbor which is basically made of two slabs of dry wall with a space inside. I am not sure what the measurements are but I would like to fill the wall with sound proofing material.

I was hoping some of you could answer my questions.

1. What is the best material to stuff the wall with?

2. Is green glue good to use?

3. What is the best way to find a professional?

4. Are there professionals who are actually certified?

5. What is the range of cost?

6. How long does construction last for?

7. Is soundproofing a 100%?

Thanks

Randy S

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Re: Soundproofing a common wall
« Reply #1 on: May 10, 2012, 04:17:15 PM »
1. What is the best material to stuff the wall with?
Answer: Cotton fiber insulation in the cavity and Mass loaded vinyl over studs wall to wall.
2. Is green glue good to use?
Answer: Yes, between 2 layers of drywall minimum 2 tube per 4'x8' sheet max 3 tube.
3. What is the best way to find a professional?
Answer: Most contractors do not know a lot about soundproofing so we suggest finding someone who is open to doing the installation as instructed.
4. Are there professionals who are actually certified?
Answer: NO
5. What is the range of cost?
Answer: material cost ranges from $3.00 sqft to $5.50 sqft  (Labor is quoted by contractor)
6. How long does construction last for?
Answer: depending on how big of a project you have and skill level of contractor.
7. Is soundproofing a 100%?
Answer: NO!! THERE IS NO SUCH THING AS 100% SOUNDPROOF :)
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040

johnbergstromslc

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Re: Soundproofing a common wall
« Reply #2 on: May 10, 2012, 06:34:48 PM »
7. Is soundproofing a 100%?
Answer: NO!! THERE IS NO SUCH THING AS 100% SOUNDPROOF :)

Not unless you want to live hundreds of feet underground....

I read in an obscure source that a 4 foot thick lead partition would have an estimated STC of 120.  At that level of isolation, only a nearby nuclear explosion or a Saturn V rocket launch would disturb you...

Randy S

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Re: Soundproofing a common wall
« Reply #3 on: May 10, 2012, 07:01:27 PM »
HAHAHA JOHN!!!  I would love to be on a project like that!
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040

lug

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Re: Soundproofing a common wall
« Reply #4 on: May 12, 2012, 03:54:37 PM »
1. What is the best material to stuff the wall with?
Answer: Cotton fiber insulation in the cavity and Mass loaded vinyl over studs wall to wall.
2. Is green glue good to use?
Answer: Yes, between 2 layers of drywall minimum 2 tube per 4'x8' sheet max 3 tube.
3. What is the best way to find a professional?
Answer: Most contractors do not know a lot about soundproofing so we suggest finding someone who is open to doing the installation as instructed.
4. Are there professionals who are actually certified?
Answer: NO
5. What is the range of cost?
Answer: material cost ranges from $3.00 sqft to $5.50 sqft  (Labor is quoted by contractor)
6. How long does construction last for?
Answer: depending on how big of a project you have and skill level of contractor.
7. Is soundproofing a 100%?
Answer: NO!! THERE IS NO SUCH THING AS 100% SOUNDPROOF :)

Thank you so much for the information.
Would I need to have to take the entire wall down to do this?

Since there is no certification, how do I know if someone is unqualified to do the job?

Randy S

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Re: Soundproofing a common wall
« Reply #5 on: May 12, 2012, 04:27:57 PM »
You must remove the drywall entirely to do the job right.

As far as someone qualified, we are set up for DIY and therefore we encourage the owner to be involved at each step of installation to ensure that mistakes are avoided.

Feel free to call me direct and we can discuss.

Randy S.
760-752-3030 ext 104
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040

lug

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Re: Soundproofing a common wall
« Reply #6 on: May 13, 2012, 06:05:02 AM »
You must remove the drywall entirely to do the job right.

]

This is starting to sound more and more expensive.

johnbergstromslc

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Re: Soundproofing a common wall
« Reply #7 on: May 13, 2012, 10:10:18 PM »
]

This is starting to sound more and more expensive.

If you scrimp and do a cut-rate job and get disappointing, minimal results, is that not a waste of money???

lug

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Re: Soundproofing a common wall
« Reply #8 on: May 14, 2012, 06:11:18 AM »
Is it possible to keep the dry wall intact or do you have to get brand new dry wall?

Randy S

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Re: Soundproofing a common wall
« Reply #9 on: May 14, 2012, 03:58:21 PM »
you most likely will have to purchase new drywall.
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040

lug

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Re: Soundproofing a common wall
« Reply #10 on: May 15, 2012, 09:51:09 PM »
you most likely will have to purchase new drywall.

Okay.

In your experience, would there be any reason a condo board would reject the proposal of soundproofing a common wall?
Also, does it help to get an acoustical consultant? Or is it necessary?

Btw, thank you for the information. It has been very helpful.

Randy S

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Re: Soundproofing a common wall
« Reply #11 on: May 15, 2012, 10:38:25 PM »
common walls are shared areas and therefore I would advise you to verify you can do this project with the condo board, I have had projects where opening the wall and ceiling was not permitted.

Hiring an acoustical consultant is usually only necessary if the noise source is undetermined or at a DBA level or frequency that is low... ie under 20htz or less than 40dba...
The reason I say 40 dba as a marker is because at lower dba it is harder to show major reductions.

Perception of reduction is important when your money is on the table..
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040

lug

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Re: Soundproofing a common wall
« Reply #12 on: May 15, 2012, 11:52:28 PM »
common walls are shred areas and therefore I would advise you to verify you can do this project with the condo board, I have had projects where opening the wall and ceiling was not permitted.

Hiring an acoustical consultant is usually only necessary if the noise source is undetermined or at a DBA level or frequency that is low... ie under 20htz or less than 40dba...
The reason I say 40 dba as a marker is because at lower dba it is harder to show major reductions.

Perception of reduction is important when your money is on the table..

Thank you again.
I will definitely be presenting this to the board for their approval. There is no way I would proceed without it.

In the case they do not allow opening up the wall, will green glue and drywall  be enough?
What is your opinion of  homasote?

Randy S

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Re: Soundproofing a common wall
« Reply #13 on: May 15, 2012, 11:57:59 PM »
no do a sandwich with MLV / Green Glue and a new layer of 5/8 drywall..much better approach
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040

lug

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Re: Soundproofing a common wall
« Reply #14 on: May 16, 2012, 12:21:34 AM »
no do a sandwich with MLV / Green Glue and a new layer of 5/8 drywall..much better approach

Okay. Thank you again.

 

anything