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Joji · 6th December 2009

I looked up Roxul

here is a link
Roxul SafeÂ®

Here are the specs

Acoustical Performance:
ASTM C423
CO-EFFICIENTS AT FREQUENCIES
Thickness 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz NRC
2.0" 0.26 0.68 1.12 1.10 1.03 1.04 1.00
3.0” 0.63 0.95 1.14 1.01 1.03 1.04 1.05
4.0” 1.03 1.07 1.12 1.04 1.07 1.08 1.10
Compressive Strength:
ASTM C 165 at 10% 144 psf (6.9 kPa)
Density:
ASTM C 612-00 Actual 4.5 lbs/ft³ 72 kg/m³
Dimensions:
24” (width) x 48” (length) [610 mm (width) x 1219 mm (length)]
Thickness:
Product thickness is available in 2”, 3”, and 4”.

Is the higher the pound density the better. this says 4.5 or is tit the lower the density. also the co-efficient at 125hz says 1.04 compared to others that say .83 or.86

Is there a big difference between .86 density and 1.04 or is it like splitting hairs

thanks

6th December 2009	#2
Joji Gear maniac Join Date: Nov 2005 Posts: 281 Thread Starter	I looked up Roxul here is a link Roxul SafeÂ® Here are the specs Acoustical Performance: ASTM C423 CO-EFFICIENTS AT FREQUENCIES Thickness 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz NRC 2.0" 0.26 0.68 1.12 1.10 1.03 1.04 1.00 3.0” 0.63 0.95 1.14 1.01 1.03 1.04 1.05 4.0” 1.03 1.07 1.12 1.04 1.07 1.08 1.10 Compressive Strength: ASTM C 165 at 10% 144 psf (6.9 kPa) Density: ASTM C 612-00 Actual 4.5 lbs/ft³ 72 kg/m³ Dimensions: 24” (width) x 48” (length) [610 mm (width) x 1219 mm (length)] Thickness: Product thickness is available in 2”, 3”, and 4”. Is the higher the pound density the better. this says 4.5 or is tit the lower the density. also the co-efficient at 125hz says 1.04 compared to others that say .83 or.86 Is there a big difference between .86 density and 1.04 or is it like splitting hairs thanks