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Re: Knauf fiberglass vs Owens Corning 705

Posted by Ethan Winer (M) on January 18, 2006 at 13:14:34

In Reply to: Knauf fiberglass vs Owens Corning 705 posted by Aristée on January 17, 2006 at 20:16:52:

Hugo,

> Does anybody knows if it is as good as OC 705 ? <

You can see the absorption coefficients for a few types of rigid fiberglass in my Acoustics FAQ:

www.ethanwiner.com/acoustics.html

> What is the density of the OC 703 ? <

3 pounds per cubic foot.

Also follow the link from my FAQ to my Density report.

I'll mention that when comparing different materials from different vendors you should ignore small changes - maybe less than 20 percent. Even though acoustic labs are certified and calibrated, they still can vary quite a lot.

--Ethan

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