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Old 02-28-2013, 05:40 AM   #1
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Quietrock


Does this need to be installed over extg. Sheet rock? We are ripping our extg. Rock down. Wow this is expensive ...$45 a board. We might be using it because we live on a busy road. Thanks

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Old 02-28-2013, 05:50 PM   #2
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Quietrock


What is "extg"? I assume you were referring to exterior-grade sheetrock, which is weather-resistant and typically installed on the outside of a structure, under carports or covered porches.

As far as I'm aware, Quietrock is intended to be installed on the interior side. If by chance you have exterior-grade installed inside your home, you can certainly go right over the top of it with the Quietrock. The double-layer will provide even more mass, in turn, absorbing more noise. If you want to go all crazy, you could even apply http://www.greengluecompany.com/ between the layers, for addition sound-deadening.

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Old 02-28-2013, 05:54 PM   #3
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Originally Posted by Seattle2k View Post
What is "extg"? I assume you were referring to exterior-grade sheetrock, which is weather-resistant and typically installed on the outside of a structure, under carports or covered porches.

As far as I'm aware, Quietrock is intended to be installed on the interior side. If by chance you have exterior-grade installed inside your home, you can certainly go right over the top of it with the Quietrock. The double-layer will provide even more mass, in turn, absorbing more noise. If you want to go all crazy, you could even apply http://www.greengluecompany.com/ between the layers, for addition sound-deadening.
I am installing this in the interior. Thought it HAD to go over extg. rock.
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Old 02-28-2013, 06:03 PM   #4
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Quietrock


I'm still assuming that "extg" is exterior grade...

The install instructions don't mention that requirement, do they? (by the way, add acoustical sealant (QuietSeal), if this is to be your primary layer of drywall)

And you're confusing me again. You thought it had to be installed over exterior grade sheetrock, but earlier you said, "We are ripping our extg. Rock down".
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Old 02-28-2013, 06:24 PM   #5
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Quietrock


You got one heck of of a deal where I am quiet rock is $100 a sheet. But I also am confused by extg The quiet rock doesn't go over anything. But it does take special sealant top, bottom, and seams to get full effect. If I remember right it's the same as 7 layers of 1/2" drywall.
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Old 02-28-2013, 07:27 PM   #6
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Originally Posted by ToolSeeker View Post
You got one heck of of a deal where I am quiet rock is $100 a sheet. But I also am confused by extg The quiet rock doesn't go over anything. But it does take special sealant top, bottom, and seams to get full effect. If I remember right it's the same as 7 layers of 1/2" drywall.
Thanks. I saw it on lowes website for that price. I thought I saw someone say they installed it right on top of Thier extg. Sheetrock.
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Old 02-28-2013, 07:33 PM   #7
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Quietrock


i think he is referring to existing not exterior
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Old 02-28-2013, 07:49 PM   #8
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Originally Posted by House2HomeLLC View Post
i think he is referring to existing not exterior
Yes I am...sorry guys
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Old 03-01-2013, 07:42 AM   #9
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Quietrock


OK that's better and no you really don't wan't to do that. If I remember right it takes a vapor barrier behind it.That plastic is then sealed top and bottom with acoustic sealer-chaulk-also you must seal around switches and outlets.
If you just put this over your existing all door and window opening will now have to be redone all outlet and switches will have to be extended.
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Old 03-01-2013, 08:38 PM   #10
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Quietrock


I must have missed the - "takes a vapor barrier behind it" part, where was that? The drywall (STC 51) rating is the same as using Roxul insulation in the cavity, though cheaper? http://quietrock.com/datasheets/func-startdown/52

Fiberglass (STC 46), #10; http://www.certainteed.com/resources...%20Control.pdf

Roxul (STC 52); http://www.roxul.com/files/RX-NA-EN/pdf/SafenSound.pdf
Check with local Fire Marshall before installing.

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Old 03-02-2013, 07:28 AM   #11
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Gary the last time I used quiet was in a hospital and they had us use the plastic vapor barrier cut long so they could use the acoustic sealer top and bottom. Put down a heavy bead then stick the plastic in it till dry. It's been a while ago and I don't remember why the man in charge of that part of the project made us do it. Maybe it's changed since then, it's something you don't work with very often.
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Old 03-02-2013, 05:39 PM   #12
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In a cold location, I could see it, but not in FL--- not today....#9, 10, 12, and 14; http://www.buildingscience.com/docum...iers_r2011.pdf

See any "pink blotches" years later, lol, pp. 6: http://www.buildingscience.com/docum...e-humid-south/

Of course, all this is from the last 7 years or so; http://www.buildingscience.com/docum...commendations/ That could explain it.

Gary

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