[Greenbuilding] Phonic insulation

[Keith Winston]

Effective sound insulation is dependent on the sound you're trying to 
stop, and the nature of your building. Double sheetrock can help kill 
low-frequency sound, especially with a decoupling layer between them, 
like that provided by greengluecompany.com or various other products. A 
fairly light material inside the walls works well on higher frequency 
sounds: fiberglass is often mentioned, but (since I hate it) I'd go with 
rockwool or blown cellulose or cotton batts or... curiously, though, you 
want a fairly light material for this, not too dense. Decoupling the two 
sides of the wall, by using double-stud walls or (much harder to do 
right) resilient channels, is crucial for the best jobs. Sealing all 
holes and cracks is crucial. And recognizing that much of the sound will 
be going around the wall instead of through it ("flanking" the wall) by 
using neighboring structures or voids to get through, means that you 
have to take a broader view than at first might appear. Finally, if 
you're having trouble with footfalls and impact noise (the basketball 
court upstairs), ideally you want a resilient subfloor or carpeting and 
a pad.

Good luck! There's mountains of information on the web. Check out 
greengluecompany.com, but there's lots more out there I'm just out of 
time ;-)

Keith


leannetim wrote:
> Hi,
> I'm looking for creative ideas for "sound" insulation materials for using in
> bedroom partition walls.  Any ideas?
> Leanne in France
>
>
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-- 
Keith Winston
Earth Sun Energy Systems
Hyattsville, MD 20781
301-980-6325
send me mail at 
keith at the company below
www.EarthSunEnergy.com