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WKG · 29th June 2006

I used Johns Manville 814 2" and it works great. Doubled it up for 4". Specs were comparable, maybe just a hair better than 703.

Here's a great site for comparison on materials.

http://www.bobgolds.com/AbsorptionCoefficients.htm

29th June 2006	#6
WKG Gear maniac Joined: Jun 2006 Posts: 276 3 Reviews written	I used Johns Manville 814 2" and it works great. Doubled it up for 4". Specs were comparable, maybe just a hair better than 703. Here's a great site for comparison on materials. http://www.bobgolds.com/AbsorptionCoefficients.htm