John Sayers' Recording Studio Design Forum Archive

Hi,

I have a large quantity of surplus 100mm regular fluffy fiberglass insulation and its density is approx 10kg/m3 (0.63 pcf). In an effort to try and incorporate this insulation into some of my acoustic treatments around the studio, i am wondering if I compress the isulation will this increase its density and therefore make it comparable to 703 insulation or what ever my desired density might be?
For example, lets say i am building a ceiling cloud and i use 5 layers of the 100mm regular 10kg/m3 (0.63 pcf) insulation (total 500mm thick) in its construction. If I compress this down to approx 100mm can i assume that the density of the insulation will now be elevated to approx 3.0 pcf (48 kg/m3)?

Thanks

hally

i am wondering if I compress the isulation will this increase its density and therefore make it comparable to 703 insulation or what ever my desired density might be?

I wouldn't do that, no. It might change the density as such, but would also change all the other characteristics, and there's no telling what type of acoustical or thermal performance you'd end up with. Compressing it won't make it into 703.

Even though that stuff is very low density, you could probably still use it as part of your bass trapping. For example, face your bass traps with that and use normal density stuff behind it. You could also use some of that inside your speaker soffits (if you are doing soffits), along with other insulation. So there are places you could use it, uncompressed, in its original form.

- Stuart -