Hi!
I'm looking for stc-info on
#1: Staggered stud vs. double stud wood walls
Everything else equal. That includes space between inner and outer layers of gypsum.
#2: Inside-out walls vs. regular
(like http://www.johnlsayers.com/phpBB2/download/file.php?id=48596
(#2b: What is the affect of puttting the same amount of insulation on the inside of the inner wall vs. none vs. having it in the cavity?)
#3: Changing distance between double walls
Everything else equal.
I'm thinking of building an inside-out design and I'm looking for this info to be able to calculate the stc-values for my design.
Relevant thread:
http://www.gearslutz.com/board/studio-b ... un-no.html
Thanks!
Wall transmission data
Originally posted at johnlsayers.com, topic 18481.
Try this:
http://archive.nrc-cnrc.gc.ca/obj/irc/d ... /ir761.pdf
:)
- Stuart -
Thanks!
I've been looking at that paper,
and missed the data asked for above.
However, I find info on insulation vs. non insulation,
comparing
page 314 "staggered wood with 1+1 16mm gypsym"
with
page 279 "staggered wood with 1+1 16mm gypsym, 90mm insulation"
That's +7stc on the insulation!!
Yep! Insulation in the cavity is very important. In fact, it can give you as much as +16 dB, in some cases. - Stuart -"staggered wood with 1+1 16mm gypsym, 90mm insulation" That's +7stc on the insulation!!
Do you have any numbers or experience with the inside-out design regarding this? I'm thinking of the effect of putting the inner-wall insulation on the inside and not in the cavity. Any difference on stc?Yep! Insulation in the cavity is very important. In fact, it can give you as much as +16 dB, in some cases. - Stuart -"staggered wood with 1+1 16mm gypsym, 90mm insulation" That's +7stc on the insulation!!
I'm not sure I understand the question: You ALWAYS need insulation in the cavity, regardless of how the wall is built, and you ALWAYS need treatment inside the room, which very often involves absorption (insulation). It doesn't matter where the studs go. The ONLY difference between a conventional wall and an inside-out wall, is that the studs are inside the cavity for a conventional wall, but they are inside the room for an inside-out wall. Apart from that, the theory and practice is exactly the same. - Stuart -I'm thinking of the effect of putting the inner-wall insulation on the inside and not in the cavity.