For you studio builders

cbastriani · 2nd March 2006

Ive seen a few posts here from people building great studios. And there was one thing i havent seen. Homasote 440. This is sound barrier drywall, that would give a soundproofing advantage. I dunno, you might know about it maybe you dont, i just think its certainly a great product and worth checkin out.
S

AlexLakis · 2nd March 2006

Most people here are trying to keep good sound IN the room, not keeping bad sound OUT of other rooms, but this is a good heads up. thumbsup

**TonyBelmont** · 2nd March 2006

Quote:

Originally Posted by cbastriani

Ive seen a few posts here from people building great studios. And there was one thing i havent seen. Homasote 440. This is sound barrier drywall, that would give a soundproofing advantage. I dunno, you might know about it maybe you dont, i just think its certainly a great product and worth checkin out.
S

It's a known product. But, in comparison a couple layers of standard drywall performs better for less....

cbastriani · 2nd March 2006

Quote:

Originally Posted by TonyBelmont

It's a known product. But, in comparison a couple layers of standard drywall performs better for less....

Didnt realize that. It would be a lil less work, and i dunno maybe you find a really good wholesale price somewhere? And when you say a couple, do you mean 2 or a couple, 3 or 4?

**TonyBelmont** · 2nd March 2006

Quote:

Originally Posted by cbastriani

Didnt realize that. It would be a lil less work, and i dunno maybe you find a really good wholesale price somewhere? And when you say a couple, do you mean 2 or a couple, 3 or 4?

2 layers of different thicknesses would be better for broadband attenuation. Preferable with green glue adhseive sandwiched betwen them... 2 x 5/8" thick sheets of drywall with green glue would be the better option for low frequency attenuation.

There's a lot of good reading on John Sayers forum in regards to this and other drywall topics.

XSergeantD · 2nd March 2006

layer plywood, layer homosote, 2 layers sheetrock. PL adhesive between each layer. DO NOT match up the seams, silicone each drywall screw, and silicone the seams - Never use spackle on the seams. But it really depends on the level of construction you're doing, a lot of places can't go this indepth

True North · 3rd March 2006

Quote:

Originally Posted by XSergeantD

layer plywood, layer homosote, 2 layers sheetrock. PL adhesive between each layer. DO NOT match up the seams, silicone each drywall screw, and silicone the seams - Never use spackle on the seams. But it really depends on the level of construction you're doing, a lot of places can't go this indepth

Hey Brent,

If you have to finish a drywall - wall you can't silicone the seams. Do you mean to use silicon on unfinished walls?

Thanks

Rader Ranch · 3rd March 2006

if anyone has any questions they should really just go here...

******//www.johnlsayers.com/phpBB2/index.php

and be prepared to read a lot.

XSergeantD · 3rd March 2006

Quote:

Originally Posted by True North

Hey Brent,

If you have to finish a drywall - wall you can't silicone the seams. Do you mean to use silicon on unfinished walls?

Thanks

Yeah if they are to be exposed.
But you still spread the silicone as if it were spackle to level the seam. Drywall has eased edges which allows the buildup of spackle (just a bit of info for those of you that didn't know that) so always try to place the cut ends of drywall at the corners and have the manufactured edges meet where you cal fll the cracks with no bulge caused by adding silicone/spackle.

nukmusic · 3rd July 2006

About to convert a house in a private studio.(new Orleans) It’s on a corner lot and also has 2 small bedrooms, a bath, and a small storage closet upstairs. The bedroom over the proposed control rm/studio with be a storage area for vinyl and road gear. The second bath with be converted into a BATH with an air freshener rack

(joking) and the bedroom over the lounge will be saved for a future writing's room.

The main concern is that there is no space for double walls(dam it) and there will be a lot of low-end being monitored in the control room. Mainly vocal recording...with a drum recording even now and then (maybe 4 times a year, if that) in the booth. The existing outer walls and coverings are 2x4 framing with ½”plywood and wooden shingles. The house’s interior is completely gutted out.

On brainstorming….the solution was to calk everywhere the existing framing and plywood connects. Add 703, rockwool, etc as the insulation. Then use MDF (or OSB or Plywood) <>drywall<>drywall to cover all the interior walls and ceiling. Then add acoustical treatment…broadband absorbency, bass hangers, eliminate parallel walls, etc etc. Run new electrical wiring from a new and separate panel.

Looking at the Quietrock stuff. ******//www.quietsolution.com/html/quietrock.html
But I just can’t see one 5/8” sheet equaling eight 5/8” sheets of regular drywall….that’s like 4” of drywall. Maybe it’s just me??? Then the price per 4x8’ sheet…WTF???....... I also thought smoking crack was bad for you? There is also Suppress that is basicly the same product class ******//www.supressproducts.com/products/index.htm

Looking at the Green Glue stuff. ******//greengluecompany.com/index.php
“Visco Elastic Sound Dampening Compound”
Looks good and cheaper than the “SPACE AGE DRYWALL”, but just wonder why it works. Why not silicon or acoustic calk?? I can’t help but to think about that automotive gasket stuff by Permatex and others… ******//www.permatex.com/products/aut...ket_makers.htm looks like the same chemical makeup.

Soundhound · 18th July 2006

[QUOTE=nukmusic]
Looking at the Quietrock stuff. ******//www.quietsolution.com/html/quietrock.html
But I just can’t see one 5/8” sheet equaling eight 5/8” sheets of regular drywall….that’s like 4” of drywall. Maybe it’s just me???
QUOTE]

Hi, I teach an AIA acoustical design course and was passing through. Eight sheets of drywall may have less effect than you imagine. Basically when adding drywall you're depending on mass law to mitigate sound transmission. You can add 6 STC every time you double the mass of a wall. If you've already got 2 layers of drywall on each side of a wall, you'd have to add 2 more (to each side) to get the next 6 STC, and 4 more for the next after that.

Second, as to how it works, the most significant source of transmission is actually through the structural elements, i.e. studs. The acoustically damped panel does its best work by preventing transmission through the stud - it's not a mass law issue.

You also mentioned something about caulking - the critical thing with acoustical sealant is that it be non-hardening. There are a few products out there that qualify.

In my opinion, damped panels are the best solution, in combination with staggered or double-stud walls for high end studios, but if you do go for them make sure you choose a manufacturer that publishes independent lab tests, because as you may have noticed (and especially in the soundboard and MLV categories) there is a lot of "fast and loose" with STC claims.

2nd March 2006	#1
cbastriani Gear Head Joined: Nov 2005 Posts: 73 Thread Starter	For you studio builders Ive seen a few posts here from people building great studios. And there was one thing i havent seen. Homasote 440. This is sound barrier drywall, that would give a soundproofing advantage. I dunno, you might know about it maybe you dont, i just think its certainly a great product and worth checkin out. S

2nd March 2006	#6
XSergeantD Lives for gear Joined: Sep 2005 Location: Las Vegas Posts: 1,036	layer plywood, layer homosote, 2 layers sheetrock. PL adhesive between each layer. DO NOT match up the seams, silicone each drywall screw, and silicone the seams - Never use spackle on the seams. But it really depends on the level of construction you're doing, a lot of places can't go this indepth __________________ - Brent - www.StudioAtThePalms.com Without music, life would be a mistake - Nietzsche Cake or Death? [/SIGPIC]

3rd July 2006	#10
nukmusic Lives for gear Joined: Jun 2004 Location: Dallas, TX / New Orleans, LA Posts: 4,667	About to convert a house in a private studio.(new Orleans) It’s on a corner lot and also has 2 small bedrooms, a bath, and a small storage closet upstairs. The bedroom over the proposed control rm/studio with be a storage area for vinyl and road gear. The second bath with be converted into a BATH with an air freshener rack (joking) and the bedroom over the lounge will be saved for a future writing's room. The main concern is that there is no space for double walls(dam it) and there will be a lot of low-end being monitored in the control room. Mainly vocal recording...with a drum recording even now and then (maybe 4 times a year, if that) in the booth. The existing outer walls and coverings are 2x4 framing with ½”plywood and wooden shingles. The house’s interior is completely gutted out. On brainstorming….the solution was to calk everywhere the existing framing and plywood connects. Add 703, rockwool, etc as the insulation. Then use MDF (or OSB or Plywood) <>drywall<>drywall to cover all the interior walls and ceiling. Then add acoustical treatment…broadband absorbency, bass hangers, eliminate parallel walls, etc etc. Run new electrical wiring from a new and separate panel. Looking at the Quietrock stuff. ****//www.quietsolution.com/html/quietrock.html But I just can’t see one 5/8” sheet equaling eight 5/8” sheets of regular drywall….that’s like 4” of drywall. Maybe it’s just me??? Then the price per 4x8’ sheet…WTF???....... I also thought smoking crack was bad for you? There is also Suppress that is basicly the same product class **//www.supressproducts.com/products/index.htm Looking at the Green Glue stuff. **//greengluecompany.com/index.php “Visco Elastic Sound Dampening Compound” Looks good and cheaper than the “SPACE AGE DRYWALL”, but just wonder why it works. Why not silicon or acoustic calk?? I can’t help but to think about that automotive gasket stuff by Permatex and others… ****//www.permatex.com/products/aut...ket_makers.htm looks like the same chemical makeup. __________________ . Docta'J aka Big NUK Practice Makes Progress www.twitter.com/nukmusic

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2nd March 2006	#2
AlexLakis Lives for gear Joined: Mar 2005 Location: Annapolis, MD/Los Angeles, CA Posts: 3,631	Most people here are trying to keep good sound IN the room, not keeping bad sound OUT of other rooms, but this is a good heads up. thumbsup

3rd March 2006	#8
Rader Ranch Gear maniac Joined: Jul 2002 Location: Knoxville, TN Posts: 282	if anyone has any questions they should really just go here... ****//www.johnlsayers.com/phpBB2/index.php and be prepared to read a lot**.

18th July 2006	#11
Soundhound Gear interested Joined: Jul 2006 Posts: 1	[QUOTE=nukmusic] Looking at the Quietrock stuff. ******//www.quietsolution.com/html/quietrock.html But I just can’t see one 5/8” sheet equaling eight 5/8” sheets of regular drywall….that’s like 4” of drywall. Maybe it’s just me??? QUOTE] Hi, I teach an AIA acoustical design course and was passing through. Eight sheets of drywall may have less effect than you imagine. Basically when adding drywall you're depending on mass law to mitigate sound transmission. You can add 6 STC every time you double the mass of a wall. If you've already got 2 layers of drywall on each side of a wall, you'd have to add 2 more (to each side) to get the next 6 STC, and 4 more for the next after that. Second, as to how it works, the most significant source of transmission is actually through the structural elements, i.e. studs. The acoustically damped panel does its best work by preventing transmission through the stud - it's not a mass law issue. You also mentioned something about caulking - the critical thing with acoustical sealant is that it be non-hardening. There are a few products out there that qualify. In my opinion, damped panels are the best solution, in combination with staggered or double-stud walls for high end studios, but if you do go for them make sure you choose a manufacturer that publishes independent lab tests, because as you may have noticed (and especially in the soundboard and MLV categories) there is a lot of "fast and loose" with STC claims.