Rank these rockwool types
Old 19th November 2012
  #1
Gear Head
 

Thread Starter
Rank these rockwool types

Hi,

Very soon I will be building DIY acoustic panels. Unfortunately, I am only able to chose out of the following rockwool types:

Rockwool 201 (density: 35 kg/m3)
Rockwool 433 (density: 45 kg/m3)
Rockwool 204 (density: 34 kg/m3)
Rockwool 504 density (140 kg/m3) !!

I am just asking for your opinions. Please rank them from best to worst!

Thank you!
Old 19th November 2012
  #2
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avare's Avatar
 

Quote:
Originally Posted by hugohuijer View Post
Hi,

Very soon I will be building DIY acoustic panels. Unfortunately, I am only able to chose out of the following rockwool types:

Rockwool 201 (density: 35 kg/m3)
Rockwool 433 (density: 45 kg/m3)
Rockwool 204 (density: 34 kg/m3)
Rockwool 504 density (140 kg/m3) !!

I am just asking for your opinions. Please rank them from best to worst!

Thank you!
Rank in terms of what? There is no "opinion" involved. The appropriate Gas Flow Resistance (GFR) varies with the density of the material, all other factors being kept the same. How deep are your panels? The deeper the panel, the less GFR is optimum. I do not recommend porous absorbers less than 100 mm deep. For that, the 433 would be best. For 150 -300 mm, either 201 or 204 should be fine.

Well ranked,
Andre
Old 19th November 2012
  #3
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Jens Eklund's Avatar
Quote:
Originally Posted by avare View Post
Rank in terms of what? There is no "opinion" involved. The appropriate Gas Flow Resistance (GFR) varies with the density of the material, all other factors being kept the same. How deep are your panels? The deeper the panel, the less GFR is optimum. I do not recommend porous absorbers less than 100 mm deep.
+1 although I usually recommend even greater depth * if velocity based absorber.
Old 19th November 2012
  #4
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Quote:
Originally Posted by Jens Eklund View Post
+1 although I usually recommend even greater depth if velocity based absorber.
Agreed. That is why I wrote minimum.

Andre
Old 19th November 2012
  #5
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Jens Eklund's Avatar
Quote:
Originally Posted by avare View Post
Agreed. That is why I wrote minimum.

Andre
* ... as minimum.
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