new construction, wall thickness and material question ?

Posted: Wed Sep 20, 2006 11:48 am

Hi

I am building a new studio.
The 24' x 40' shed is built, insulated, and the inner walls are sheetrocked with 1 layer.

Now I am constructing the rooms within the big room.

I was wondering if there is any sound isolation benefit to adding a layer of homosote in between layers of sheetrock ?
Would I be better off with 3 layers of sheetrock, or 2 layers of sheetrock with homosote in between them ?
Which is better for sound isolation ?

I need to keep the peace with my neighbors, so I do need to make sure sound transference is at a minimum.

Also, is there a significant increase in isolation with that vinyl/lead "soundblock" that comes in a roll or sheets currently on the market ?
I know it is expensive, but I am wobdering if the benefits are worth the expense ( I do have a budget Wink

thanks in advance for any help

Steve

Posted: Wed Sep 20, 2006 5:08 pm

Jankland wrote:

Hi

I am building a new studio.
The 24' x 40' shed is built, insulated, and the inner walls are sheetrocked with 1 layer.

Steve,

that's your first mistake - you do not want drywall on the inner face of your shell building - that creates a 3 leaf system - which is to be avoided. So begin with removing that material.

If you cut it out carefully at the inside face of the studs / shoe / top plates - you can reinstall it tight to the outside face of the walls where it will give you some benifit.

If you added another layer there it would help even more.

Quote:

I was wondering if there is any sound isolation benefit to adding a layer of homosote in between layers of sheetrock ?
Would I be better off with 3 layers of sheetrock, or 2 layers of sheetrock with homosote in between them ?
Which is better for sound isolation ?

3 layers of drywall beats drywall with homosote.

Quote:

I need to keep the peace with my neighbors, so I do need to make sure sound transference is at a minimum.

Also, is there a significant increase in isolation with that vinyl/lead "soundblock" that comes in a roll or sheets currently on the market ?
I know it is expensive, but I am wobdering if the benefits are worth the expense ( I do have a budget Wink

Not any benifit that I would spend money on -

However - if you really want a benifit - then Green Glue is the product to use - and to save you asking - no - there is no other product that exists (that I am aware of) that does what Green Glue does.

You cannot acheive those results with glue - nor with caulk - nor with anything else.

Here's a link to the company website:

http://www.greengluecompany.com/

Sincerely,

Rod

Posted: Wed Sep 20, 2006 7:48 pm

Rod Gervais wrote:

Jankland wrote:

Hi

Also, is there a significant increase in isolation with that vinyl/lead "soundblock" that comes in a roll or sheets currently on the market ?
I know it is expensive, but I am wobdering if the benefits are worth the expense ( I do have a budget Wink

Not any benifit that I would spend money on -

However - if you really want a benifit - then Green Glue is the product to use - and to save you asking - no - there is no other product that exists (that I am aware of) that does what Green Glue does.

You cannot acheive those results with glue - nor with caulk - nor with anything else.

Here's a link to the company website:

http://www.greengluecompany.com/

Sincerely,

Rod

I am sold on Green Glue after reading the web site. thanks for that tip.
how much more of a benefit will I get with 3 layers of sheetrock than I will get with 2 layers with Green Glue in between ?

In other words, is it worth the expense of a 3rd layer of sheetrock ?

thanks in advance for your reply

Posted: Sun Oct 15, 2006 2:03 pm

You probably should spend more time on the GG site - your questions are more than answered there. Under the TECHNOLOGY tab at the top of the site are several links to the incredible amount of research that's gone into this product - specifically, the very last link

http://www.greengluecompany.com/transmissionLossTests.php

If you've not spent at least one 8-hour DAY on that site, you've not begun to see it all... Steve

Posted: Sun Nov 05, 2006 1:08 pm

while I am sure GG does work I question the results verses how much was applied verses how the recommend you apply it.

Can we all agree GG is the most expensive tube of anything you are likely to buy. For that reason the have more than one recommendation indicating 1-2 tubes per sheet and going on to say more than 3 provides no additional benefit.

I think the reason the stop at three is because nobody could justify the cost whereas at that point the can no longer make the argument that it is cost effective when compared to additional layesr of sheetrock.

BUT, how do we know that the test performed did not have 5 tubes of GG per sheet? How do we know they didn't spread it out to cover 100% of the surface rather than squirting a bead all over as they instruct.

Why wouldn't silicon or some sort of flexible caulk give the same results?

I don't trust anyone who is charging $18 for a tube of caulk. They are making a killing on this product.

Posted: Mon Nov 06, 2006 8:47 pm

packrat wrote:

while I am sure GG does work I question the results verses how much was applied verses how they recommend you apply it.

Can we all agree GG is the most expensive tube of anything you are likely to buy. For that reason the have more than one recommendation indicating 1-2 tubes per sheet and going on to say more than 3 provides no additional benefit.

I think the reason they stop at three is because nobody could justify the cost whereas at that point the can no longer make the argument that it is cost effective when compared to additional layesr of sheetrock.

Perhaps they say that more than 3 provides no reall additional benefit because that's the simple truth.

Quote:

BUT, how do we know that the test performed did not have 5 tubes of GG per sheet? How do we know they didn't spread it out to cover 100% of the surface rather than squirting a bead all over as they instruct.

We know what they did because the independent lab doing the testing reported exactly what was used.

That's why independent labs are used - because they will accurately report what took place - nothing ore nothing less.

Quote:

Why wouldn't silicon or some sort of flexible caulk give the same results?

BECAUSE THIS ISN"T CAULK!!!!!!!!!!!!!!!!!!!!

Quote:

I don't trust anyone who is charging $18 for a tube of caulk. They are making a killing on this product.

Once again - I think you haven't got a clue of what caulk is or does - and I KNOW you don't have a clue what GG is or what it does.

Caulk will bond the sheets to become one - GG will not.........

Caulk will complete curing until it acts like mentioned (as a construction adhesive)

GG will not cure and join the pieces together - which allows it to continue to work in the manner mentioned above - to act as an isolating aide -

You keep loosing track of the fact that this product is not glue - not caulk - not an adhesive..........

Rod

Posted: Mon Nov 06, 2006 11:31 pm

(I recently bought you book btw)

Like many products when there is competition by more than one supplier the price will drop and the consumer benefits. Does GG have a competitor?
If the answer is no then that's is why the price is still so high. If I were them I'd be doing the same thing.

It seems to be the only product of it's kind so I am suspicious. Especially when I am looking at spending $1,000 for GG on a 2000cf room.

Posted: Tue Nov 07, 2006 1:10 am

packrat:

Green Glue's most famous compeditor is http://www.quietsolution.com/html/quietglue.html

However I understand that quietglue is not as good as Green Glue.
Certainly there are fewer 3rd party tests on the quiet solution website, vs the tests on the green glue website.

As far as I know, Green Glue's the cheapest CLD product for drywall sized projects (there are other products CLD between steel sheets). And as far as I know, Green Glue is the most effective CLD product for drywall sized projects (highest damping at sound frequencies, including LF).

QuietSolution's QuietRock drywall is easier to install (which might save labor or time) over a drywall/GreenGlue DIY install, and works reasonably well.

Hmm. This is new: http://www.quiethomewindows.com/
STC42 windows.

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