Hi, I wanted to knwo if there's any resource on the topic of density of Insulation, when searching I find nothing useful, someone talking about the general use of 40kg/m3 density for rockwool and fiberglass..
But my guess is that depending on how THICK your insulation is, the less it has to be in density, correct?
So the theory question is: Is there any general way to calculate thickness vs. density
And the practical question is: Will 30kg/m3 Rockwool with 70mm thickness be enough in a floating floor or should I go for a higher density?
Actually I found something at one of the dealers (Isover) homepage.
They say that it should be low density insulation and heavy leafs (that I knew from the start) and that the thickness improves low frequency isolation, ie. the thicker the more you reduce low end.
any thoughts on that?
Well, I just browsed through a catalog and found that Vibratec also recommend low density.
Agreed; for low frequency isolation, a complete fill of lower density ( maybe 16-30 kG, or 1-2 PCF) insulation with 10-15% compression will give best TL at lower frequencies. For nearly any floated floor, damping is important - hence the compression comment... Steve
Soooo, when a Musician dies, do they hear the white noise at the end of the tunnel??!? Hmmmm...
Any difference for walls? My walls are open at one end facing my concrete wall.. I thought I'd go for a 95mm thickness but how about density and so forth.. people talk about "Studio Grade" insulation.. and that means??
No real difference, other than gravity - you need different ways of keeping the insulation in contact with (and not sagging to the bottom of) the walls. Otherwise, the physics doesn't change just because it's vertical instead of horizontal.
The term "Studio Grade" insulation.. means that person either doesn't know or is trying to sound like they do - for years, OC 703 was the "standard" for studio insulation, because it will work for ANYTHING. Maybe that's where the term came from...
However, thanks largely in part to our Canadian friends and their tireless experimentation we now know it isn't the BEST for in-wall use, the lighter stuff improves overall isolation when full-range sound needs to be blocked.
HTH... Steve
Soooo, when a Musician dies, do they hear the white noise at the end of the tunnel??!? Hmmmm...
this is where the vinyl straps come handy, I'll actually going for a neoprene rubber band type and just stretch it between the studs, like a loosely woven spierweb.
So I'll stick with the flexibatts that I used on the floor then, I just found some other Insulation that the re-seller called "soundboard" but it was about 5 times more $$$ and since I need quite a bit of it I'll go for quantity instead of (possibly) quality.
I'll go to the store tomorrow and ask about density and other specs on that soundboard and post them just in case it's worth the money vs. isolation.
question is: Will 30kg/m3 Rockwool with 70mm thickness be enough in a floating floor or should I go for a higher density?