2" 703 is $1.87 per sq foot
2" 4lb rockwool is .60 per square foot
is there a good reason to use 703 instead of rockwool?
Rockwool is so much cheaper than 703 why use 703???
Originally posted at johnlsayers.com, topic 6766.
Different applications, typically.
The Rockwool is a little more flimsy than the 703 (which a semi-rigid board).
The Rockwool is great for inside your walls and cavities. The 703 is great for making acoustic panels that you hang on ceiling or walls, etc. The 703 can also be cut into different shapes or sizes, and there's a chemical as well that you can use to harden the edges for making those panels (the name escapes me at the moment).
Each one has their +/- for their application. This topic has been answered in great detail, but it's been awhile since I've poked around and found it. use the search function, and you'll get all sorts of info, specs, etc.
:D
I'd love to know what that chemical is called, and where to get it. Aaron? Anyone? Thanks in advance :)and there's a chemical as well that you can use to harden the edges for making those panels (the name escapes me at the moment) :D
I'll find out for you. Davidk here on the site bought some. I just sent an email to find out.
He's got to go dig it out of the garage, but you can purchase it through SPI.
It's a type of liquid glass. You can use it to bond 703 together to make a large panel if you like as well.
Cool, thanks Aaron (and Davidk)!
:)
Anything on this page
http://www.bobgolds.com/AbsorptionCoefficients.htm
can be used to create any kind of absorber (fiberglass, rockwool, cotton, polyester).
With fiberglass (such as 703) you can use a fiberglass boat repair resin kit to harden the edges.
OK, here's the stuff... It's called Sodium Silicate.
http://www.pqcorp.com/productlines/Sodi ... teHome.asp