Window thickness for not decoupled wall? URGENT!!

I'm sorry I also posted this one at studiotips, but I need some comments as soon as possible. hopefully this is ok. I'm installing a window in my wall. Yes, I know.. my wall sucks.. but anyway, I will have to stick with it. one side is 3 layer cardboard = 3,7 cm the other side is 2 layers = 3 cm both sides are not decoupled, as you can see on the pic. using the 1/3 rule this would mean 12 mm and 10 mm windows. I was wondering, if using this thickness wouldn't be a waste of money for a not decoupled wall. the 12 mm would cost me about 80 Euro using simple glass - not very cheap... would do you think?? using a bit thinner glass? or a different concept?!? at the moment im thinking of using 10mm and 8mm panes.

hey i dont know if this is of any help but rather than have a window why not have a camera and monitor set up? this way you dont have to touch the wall.

as you can see on the pic the wall is allready touched :roll: :lol: thanks anyway, but I think a camra isn't the same as a real window with direct sight contact.

ok sorry i thougt you meant for communication between the studio and control room my bad.

When you said "cardboard" did you mean MDF? What is the gap between the two sides of the wall? If I remember correctly, I don't think you're going to get any better isolation with two panes if the wall is not separate. You'd be better off going with one thicker sheet of glass. You might also consider laminated glass since you do get better performance than you would with the same thickness of plate (float) glass. len

len-morgan wrote:

What is the gap between the two sides of the wall? If I remember correctly, I don't think you're going to get any better isolation with two panes if the wall is not separate.

Len, You are apparently remembering incorrectly. :wink: The value of the doublepanes of glass is exactly the same as is the layers of drywall on each face - thus (with the light guage metal framing which acts the same as wood with resilient channel from the perspective of decoupling) you have a MAM system - and want to maintain this through the window opening.

You might also consider laminated glass since you do get better performance than you would with the same thickness of plate (float) glass.

In this you are correct. To the original poster - you were given excellent advice by Eric at Studio Tips- follow it. Sincerely, Rod

To the original poster - you were given excellent advice by Eric at Studio Tips- follow it.

yep. in the meantime .. :) eric knows what's got and what's not. ;)

Well, at least I'm batting .500! Too bad we're not playing baseball. :-( Rod, I guess you knew something I didn't about the poster (I didn't see the other thread he was talking about). I thought we were talking about WOOD stud construction. Wouldn't that change the equation? len

...I see steel stud in the wall... (You have to whisper it, like in Sixth Sense... ;-)) --Keith :mrgreen:

len-morgan wrote:

Rod, I guess you knew something I didn't about the poster (I didn't see the other thread he was talking about). I thought we were talking about WOOD stud construction.

Len, I can see the steel stud in the picture.

Wouldn't that change the equation?

Nope - although the wall would not have a high a level of isolation as the steel studs, you won't ever equal the isolation of a 2 leaf system with a single leaf of the same mass....... Sincerely, Rod

if someone is interested: this is the other thread: http://forum.studiotips.com/viewtopic.php?t=2485

Sharward wrote:

...I see steel stud in the wall... (You have to whisper it, like in Sixth Sense...

Rod Gervias wrote:

I can see the steel stud in the picture.

Now I'm really getting worried (about my mental faculties)!!! Are we looking at the same picture? The one at the top of this thread? I only see a wall with 3 layers of DW on one side, some insulation in the gap, and two layers of DW on the other side. Would someone be so kind as to draw a BIG arrow and point to the steel stud in the picture? Thank you. len

len-morgan wrote:

Are we looking at the same picture? The one at the top of this thread? I only see a wall with 3 layers of DW on one side, some insulation in the gap, and two layers of DW on the other side. Would someone be so kind as to draw a BIG arrow and point to the steel stud in the picture?

Len, I think you're looking too hard. It's almost dead center in the picture - and cuts the insulation in 1/2. You can see that the insulation on the right side of it is pushed down a bit further than the pad on the left. Can you see it now? Rod

Rod, Yeah, I guess I see it now. Boy if you didn't know it was there (and what it was) it could be anything. I thought that black area was just a knot (which now that I think about it would be unlikely in drywall!) You were right, I was looking too hard - I was looking for a bright shinny silvery thing. The cut in the insulation down the middle also kind of gives it away. Sorry for being a dunce on this one. But then again, I'm the one that measured 3 times to get an opening for my A/C register in the drywall and ended up having a ceiling joist run right through the middle of it. :-( len

For those who didn't catch it...

Thanks, Keith and sorry Nuuk for temporarily taking your thread for a ride. len

len-morgan wrote:

Rod, But then again, I'm the one that measured 3 times to get an opening for my A/C register in the drywall and ended up having a ceiling joist run right through the middle of it. :-( len

Len, I'm glad to hear I'm not the only one that makes mistakes like that. :D Scott

plus6vu wrote:

I'm glad to hear I'm not the only one that makes mistakes like that.

Ah, but do you photograph it and put in your thread to show the world? :-) len

Don Henley's "Dirty Laundry" comes to mind here :wink: