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Ethan Winer · 29th June 2006

> Are there any alternatives to 705 ?? Something besides owens corning ??
And how much more effective will 705 be than 703 ??? <

There are lots of materials, but rigid fiberglass and mineral wool are known to work very well. There's also acoustic cotton, but it costs more than rigid fiberglass and is not Class A fire rated as far as I know. As for 705 versus 703, 705 is a little better but it costs twice as much. I did a comparison of exactly what you're asking a while ago, and here's that report:

www.ethanwiner.com/density/density.html

--Ethan

29th June 2006	#13
Ethan Winer Gear Guru Joined: Oct 2002 Location: New Milford, CT, USA Posts: 12,333	> Are there any alternatives to 705 ?? Something besides owens corning ?? And how much more effective will 705 be than 703 ??? < There are lots of materials, but rigid fiberglass and mineral wool are known to work very well. There's also acoustic cotton, but it costs more than rigid fiberglass and is not Class A fire rated as far as I know. As for 705 versus 703, 705 is a little better but it costs twice as much. I did a comparison of exactly what you're asking a while ago, and here's that report: www.ethanwiner.com/density/density.html --Ethan __________________ Ethan's audio book is now available!