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PostPosted: Wed Jan 13, 2021 7:26 am 
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Joined: Wed Sep 30, 2020 8:38 pm
Posts: 3
Location: Dorsten, Germany
Hey folks,

I'm planning to build some bass traps with Rockwool's "sonorock" insulation. My question is: before covering them with breathable fabric, do I need to put some kind of plastic foil over the rockwool? I'm a little concerned about possibly breathing this stuff in every day. Is it harmful? Also, wouldn't a plastic foil be reflective towards higher frequencies? I hope someone can give me some advice.

Cheers,
Mika


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PostPosted: Wed Jan 13, 2021 9:35 am 
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Joined: Tue Mar 25, 2008 3:31 am
Posts: 520
Location: Cork Ireland
Many people worry about this. Rockwool is not really toxic, it dissolves in the lung within a couple of weeks. It is just Rock!
A thin layer of plastic like Clingfilm will not affect HF. The fabric would absorb it in any case.
But may I suggest a modern option available locally to you. These Polyester batts are totally safe and do not even need fabric.
https://www.don-audio.com/Caruso-B100-B ... er-Isobond

If you are making deep traps, you would use cheap fibre and use a thin layer of Isobond instead of fabric.

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DanDan FitzGerald MIOA MAES
http://www.irishacoustics.com
http://www.soundsound.ie


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