Hi all,

almost ready for the trades to come in.

I am unsure if i should speand the extra cash on DD on the walls with the GG. The ceiling is a no brainer, but are the walls ok with 1/2 " drywall and roxall inside? these are outside walls BTW.

i do have an inside wall to separates the rooms and on this wall, 2 layers are in order i feel... but on outside walls? seems like a waste of money to me.

anyone done 2 layer on outside walls ???

Depends on.
1. If you want the neighbors complaining about the noise from your movies.
2. Also to keep the outside noise OUT.

It works both ways. We did all the outside walls of our master bedroom with DD & GG to keep the traffic noise out. Works great.

And sound will still flank.

Right. Sound will flank. So after the sound easily passes through your 1/2" drywall, where does it go? Straight up into your joists.

If you can afford the few extra bucks it takes I would do it. Adding it later will be a PITA and its well worth the cost IMO.

There are tons of guys that come on here asking about sound isolation but don't want to spend the cash. This is one reason alot of the builds you see take 2 years and sometimes more to build as they are paying cash as they build. You may not have a instant theater doing it this way but you will be alot happier in the long run if your funds are tight :)

I'm more then happy with results I got from doing 5/8 DD & GG as I can crank it up at 2am and not bother anyone that is sleeping :D

If you can afford the few extra bucks it takes I would do it. Adding it later will be a PITA and its well worth the cost IMO.

There are tons of guys that come on here asking about sound isolation but don't want to spend the cash. This is one reason alot of the builds you see take 2 years and sometimes more to build as they are paying cash as they build. You may not have a instant theater doing it this way but you will be alot happier in the long run if your funds are tight :)

I agree...always easier to do it during build out than come back later and add then. Then it's much more messy, expensive and tiresome.

Frank

I don't really want to hijack this thread, but its a quick question and I don't want to start a new thread, and searching has come up empty (it could be that I suck at search engines).

I'm in the very beginning stages of my dedicated HT build (really true construction won't start for a year or so), but the room I'm converting was an old single car garage that prior to me was converted into a storage/utility room.

I'm planning on building a room within a room. The room is aprox 12x20 with 9' ceilings. I have to rip all the current Drywall out so I can insulate the room (currently there is none).

So this is my question; After I'm done insulating the original walls do I drywall them or only the new interior room with DD/GG. I swear I've read that doing DD->insulated wall (no drywall on inside of interior wall), space, Drywall->wall->drywall would cause issues with resonating frequencies. But now I'm not sure. I would think the more mass the better, but don't know for sure.

We're re-doing our entire house so the demo may come quicker than I had planned, and I want to know if I should drywall that space also, or leave it just insulation, when we drywall the rest of the house.

I hope that makes sense and if you think I should start a new thread I can.

TIA

Good question.

Scenario #1 Do not drywall internal surface(s)

Scenario #2 Drywall internal surface(s)

There is more mass in scenario #2 but a larger single air cavity in scenario #1

The single air cavity volume is a bigger deal than the mass from that intervening drywall layer. So you would never drywall internally. Additionally, if you were building a wall in front of an existing wall, you would definately fare better by removing the existing drywall and exposing that luxuriously deep air cavity.

The deep air cavity is so critical because it lowers the resonance point of the wall. This allows you to isolate lower frequencies much better.

Thanks Ted, I was hoping you'd see it. That is what I was thinking, no internal Drywall. I'm so excited about this, even though its probably a year or so away, I can't stop thinking about it.

Hopefully some day I'll actually start a build thread.

Thanks again.

I don't really want to hijack this thread, but its a quick question and I don't want to start a new thread, and searching has come up empty (it could be that I suck at search engines).

I'm in the very beginning stages of my dedicated HT build (really true construction won't start for a year or so), but the room I'm converting was an old single car garage that prior to me was converted into a storage/utility room.

I'm planning on building a room within a room. The room is aprox 12x20 with 9' ceilings. I have to rip all the current Drywall out so I can insulate the room (currently there is none).

So this is my question; After I'm done insulating the original walls do I drywall them or only the new interior room with DD/GG. I swear I've read that doing DD->insulated wall (no drywall on inside of interior wall), space, Drywall->wall->drywall would cause issues with resonating frequencies. But now I'm not sure. I would think the more mass the better, but don't know for sure.

We're re-doing our entire house so the demo may come quicker than I had planned, and I want to know if I should drywall that space also, or leave it just insulation, when we drywall the rest of the house.

I hope that makes sense and if you think I should start a new thread I can.

TIA

referance info

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

Im am very sceptical about GG...I have read the info on it and just think its one of those things the "makers" try and hype up. BUT this is just my opinion.

Everyone applies GG to multiple layers of OSB + sheetrock or multipule layers of sheetrock.

Has anyone tried a room with 2 or 3 layers without GG? Please dont take this as an attack on those using GG. Just take it as a real question.

Look at the independent acoustic lab reports. Also look at other damping materials like Quiet Rock, Quiet Glue, Supress, Sound Break, ComfortGuard, Decibel Drop, Quiet Steel (Ford) and Swedak.

All use damping technology

Thanks Ted, I was hoping you'd see it. That is what I was thinking, no internal Drywall. I'm so excited about this, even though its probably a year or so away, I can't stop thinking about it.

Hopefully some day I'll actually start a build thread.

Thanks again.

Your enthusiasm is infectious. Thanks for it. Please keep us all posted.

referance info

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


Thanks for the link, I new I had heard about it some where but I couldn't remember what it was called, all I knew is that it had something to do with tree's. :D (Triple Leaf) :cool:

The key point isn't that having two air cavities is evil, per say. It that we would be much better off uniting them to create a single large cavity

way to hijack the thread!

Not that i am personally offended, but if others are searching for specific questions in the future, this thread is now off track with regards to the original question.

just start a new thread, its no big deal, and makes searching more powerful.

my 2 cents!

Andrew