Quiet Glue vs. Green Glue

Posted: Mon Dec 24, 2007 10:57 pm

It's late.

Thanks to each of you for making this a valuable topic for future reference.

Good wishes to you all,

Posted: Tue Dec 25, 2007 6:40 am

Glide wrote:

Brian's data above shows:
Green Glue = STC 55 - QuietGlue (type B Test 1)=STC 50

So I simply subtracted 55 - 50 = 5

Am I doing that wrong, and how do you derive 10 from that equation?

Glide,

I know that there are (apparently) 2 different chemical compositions of Quiet Glue on the market. One reports numbers of 50 STC - the other has numbers reported at 45 STC.

I have no way of knowing how much of what type is sitting where - how much type of type A might be sitting in some wherehouse waiting to be shipped - but I would bet you a 10 dollars against your 1 that Quiet Zone didn't destroy tens or hgundreds of dollars of type A just because they introduced type B.

And seeing as they kept this all a secret - seeing as they didn't do a formal announcement of the introduction of their new improved Type II Quiet Glue - - we have no way of knowing which product we are actually purchasing.

Therefor if should err I choose to err on the side of the consumer.

As far as I am concerned - until it is proven to me that the type A product no longer exists - then I consider chances no better than 50/50 to come up with either product. And I will not even consider the higher numbers until I jhave that guarantee.

From my perspective they just don't exist......... and now I want to see actuall hard test data.

So - I check the link posted by Brian - - and what I see is this -

Quote:

Part 1 -

Engineered Damping Glue Assembly

5/8” drywall + Engineered Damping Glue @ 2.5 tubes per 4’x8’ sheet + 5/8” drywall

2x4 Wood Stud (24” OC)

R13 fiberglass insulation

5/8” drywall + Engineered Damping Glue @ 2.5 tubes per 4’x8’ sheet + 5/8” drywall
Test Number: OL 06-0940

Green Glue Assembly II

5/8” Drywall Green Glue (2 tubes per 4’x8’ sheet)+ 5/8” Drywall

2x4 Wood Stud (24” OC)

R13 fiberglass insulation

5/8” drywall + Green Glue @ 2 tubes per 4’x8’ sheet + 5/8” drywall

Test Number: OL-05-1049

When I review the Tests performed at Orfield Laboratories, Inc. (The test numbers are (of course) links) I find that test OL 06-0940 reported an STC rating of 45 - and test OL-05-1049 reported an STC Rating of 55.

Without bothering to go to see the reports - if I simply drop down the page I see:

Quote:

Part 2

Wall Setup.........................STC............OITC
Engineered Damping Glue..... 45................33
Green Glue...........................55................39

As an aside (for just a moment) I also find it interesting that the Green Glue beat out the Quiet Glue by so great a margin when considering that they only used 80% of the product that was used for the Quiet Glue (2 tubes per sheet vrs 2 1/2 tubes per sheet).

Seeing as Brian has not posted the test results for the type B QG I can only wonder if it took 25% more product to come within those 5 dB... perhaps he'll comment on this.

Sincerely,

Rod

Posted: Fri Dec 28, 2007 9:01 pm

Gentlemen,

The type B test didn't use an excess of glue, its just a better QuietGlue than the first stuff we tested (both from tubes/fairly new).

Just to add a comment that never seems to get much attention, 25% coverage of Green Glue performs as well as the best of these, and is much cheaper. The performance margin is sizeable between these two products.

Green Glue at 25% coverage performing pretty well is something that I personally think is cool. That's getting towards 20 cents/sq foot for some definite improvements, and I just don't have any problems recommending that to people on a budget. We are planning some R&D work to outline the "best pattern" for such low coverage, and certainly this will begin to matter when so little area is covered in damping material. That should be interesting, I think.

Brian

Posted: Sat Dec 29, 2007 6:39 am

I'll go ahead and ask the budget conscious question...

If you have a small studio (Typical Garage/Bedroom) would you be best served to use green glue in the Control Room or in your Tracking Room?

e.g. If you had a choice of 25 percent coverage for all of the studio, or a 50 percent coverage for one room... which would give the best performance for the dollar?

Thanx,
Max

Posted: Sat Dec 29, 2007 8:09 am

Max,

Once a wall assemnbly is done it's done - and it works exactly the same in both directions.

for the 25% vrs 50% - you'll have to wait for Brian to answer......... I have no way of knowing.......

Rod

Posted: Sat Dec 29, 2007 9:45 am

I'm not trying to be too FOS here (ror trying to hijack the thread) , but you KNOW how the questions will be asked... in all kinds of variations and 30 different ways of asking the same thing...

Just thought I'd try to head off a few and just cut right to the chase...

I'm just envisioning those folks trying to get the best bang for the buck... and the venerable questions of the cheapest way to do things vs. the best way to do things. As some builds are are shoestring budgets, I think it would be good to know if it would be best to use 25 percent coverage everywhere or if it make more sense to shoot for one room or the other to get 50 percent coverage.

Posted: Sat Dec 29, 2007 10:24 am

MadMax wrote:

or if it make more sense to shoot for one room or the other to get 50 percent coverage.

It all depends on how much isolation is wanted/needed between the various spaces. If someone has determined how much isolation is wanted and how much is affordable, it is the person's decision where they will compromise, or wait and get enough money to do it to their needs.

There is no general answer.

Andre

Posted: Tue Jan 08, 2008 7:50 am

OK, lemme be stubborn then and beg some indulgence...

Take my build for instance... (last question is a pseudo real question)

My wall construction (as designed) will be:
2x6 stud
.75 MDF
.625 Gypsum
Green Glue
.625 Gypsum

(with finishes over that)

Is there ANY STC performance benefit to using 25-50% coverage between the MDF and gypsum and then 25-50% coverage between gypsum layers?? (As opposed to full coverage just between the two gypsum layers.)

Also, is there any significant TL gain to doing full coverage between the MDF and the 1st gypsum layer as well as between the two gypsum layers?

My guess is that in regards to the last (pseudo) question, that this is going to be a subjective answer. However, I'm asking from the premise that cost/db increase in TL is a definable value.

Thanx for humoring me...
Max

Posted: Tue Oct 07, 2008 12:16 am

Here are direct tests results related to Green Glue vs. Quiet Glue:

http://www.soundisolationstore.com/v/qgvsgg.pdf

This test is provided at http://www.SoundIsolationStore.com

Let me know if you have any questions, contact me through PM.

Sorry, this is not a SPAM message. I do want to discuss this if anyone else still wants to...

Posted: Tue Oct 07, 2008 6:05 pm

Should I post "You are late" or PM you?

I never know when to do which one.

Posted: Tue Oct 07, 2008 6:30 pm

Oops, misread the dates... Thought I was only off by a few weeks for some reason.

Well, now someone can search for that if they need it...

Posted: Tue Oct 07, 2008 9:28 pm

ericpollard wrote:

Thought I was only off by a few weeks for some reason.

you are only off by one time unit. Welcome to Rod's Place!

Andre

Posted: Wed Oct 08, 2008 4:47 pm

ericpollard wrote:

Here are direct tests results related to Green Glue vs. Quiet Glue:

http://www.soundisolationstore.com/v/qgvsgg.pdf

This test is provided at http://www.SoundIsolationStore.com

Eric,

although I appreciate the support for Green Glue - the results supporting them without posting the actual reports from the testing lab - are as useless to me (and others) as when their competitors make their claims without the same reports.

you should either make the actual reports available for the public to review - or pull the data from your site - IMHO it actually makes the Green Glue company look bad - not good - to have this sort of data out there.

Sincerely,

Rod

Posted: Wed Oct 08, 2008 5:03 pm

Rod Gervais wrote:

ericpollard wrote:

Here are direct tests results related to Green Glue vs. Quiet Glue:

http://www.soundisolationstore.com/v/qgvsgg.pdf

This test is provided at http://www.SoundIsolationStore.com

Eric,

although I appreciate the support for Green Glue - the results supporting them without posting the actual reports from the testing lab - are as useless to me (and others) as when their competitors make their claims without the same reports.

you should either make the actual reports available for the public to review - or pull the data from your site - IMHO it actually makes the Green Glue company look bad - not good - to have this sort of data out there.

Sincerely,

Rod

That info is available and I will make it accessible in the next couple days--no problem. I understand the need for the actual lab tests, but since the .PDF I linked has several tests in 1 it is simpler to just post the file I posted. And that way my site doesn't get jumbled up with 100 links on the left navigation bar.

Either way, I'll get that posted this week. Thanks!

Posted: Wed Oct 08, 2008 6:23 pm

"I understand the need for the actual lab tests, but since the .PDF I linked has several tests in 1 it is simpler to just post the file I posted. And that way my site doesn't get jumbled up with 100 links on the left navigation bar."

Websites and link management are not even on my high priorty list when I am looking for data.

But thanks for the corrections,

John N.(Niave) Person

This topic sponsored by: