Just a quick update..
I called Bob Turley about the AFB and he wasnt interested in selling to me.
said they werea wholesaler.. but he did give me another number.
Rosel Building materials (630) 894-5200.
They didnt sell Roxul products but had USG products which the fellow said was pretty much the same thing.
Said the 3" x 24" rolls were $20.54 and covered aboot 64sq. ft
Do you guys know about this stuff? is it worth getting?
Will she hold, captain?!
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giles117
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Manfriday
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Excellent. I'm gonna go buy some this weekend! 
Another question.. maybe this belongs in the acoustics section.. but..
where the HECK can I get this OC 703 (or 705) stuff?
I am sure I am going to need bass traps and diffusors in this little room of mine. I have looked around and called everyone I could think of.. nobody has this stuff.
Im thinking about just dialing random numbersand asking whoever answers the phone if they have any 703 in their garage I could buy off them.
If 703 cannot be found can this mineralwool be used in it's stead?
Seems like I read someone around here had done this?
Another question.. maybe this belongs in the acoustics section.. but..
where the HECK can I get this OC 703 (or 705) stuff?
I am sure I am going to need bass traps and diffusors in this little room of mine. I have looked around and called everyone I could think of.. nobody has this stuff.
Im thinking about just dialing random numbersand asking whoever answers the phone if they have any 703 in their garage I could buy off them.
If 703 cannot be found can this mineralwool be used in it's stead?
Seems like I read someone around here had done this?
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giles117
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I Used Mineral wool instead of 703 on my live room walls.
They make a Semi-Rigid Mineral wool with a density of 3 to 4pcf. That is what you need to look for.
Plus it is like 1/4 the cost of 703. Just cloth cover and run with it.
Bryan Giles
Actually (I am editing this post) the thermafiber makes a 1" 4pcf product which is semi-rigid.
You can use that. The Roxul RHT-40 is the comparable product and comes in sizes from 1" to 4" I used 2" on the Live room walls and I used 4" In my control room for the angled rear walls. See Studios under construction -> Patricks Den Recording Studio.
Hope this all helps.
They make a Semi-Rigid Mineral wool with a density of 3 to 4pcf. That is what you need to look for.
Plus it is like 1/4 the cost of 703. Just cloth cover and run with it.
Bryan Giles
Actually (I am editing this post) the thermafiber makes a 1" 4pcf product which is semi-rigid.
You can use that. The Roxul RHT-40 is the comparable product and comes in sizes from 1" to 4" I used 2" on the Live room walls and I used 4" In my control room for the angled rear walls. See Studios under construction -> Patricks Den Recording Studio.
Hope this all helps.
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knightfly
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The ongoing battle of getting Owens Corning to sell us mere mortals their precious 703 series of insulation is a real pain in the ass. I guess we're just not a massive enough force to cause them to take notice...
The only success we hear about is people calling every commercial drywall/insulation contractor in a 40 mile radius of their location and asking about it. When members of this forum do that, we REALLY appreciate their posting the results (if positive) in the Materials forum so others can benefit.
There are other nearly identical products available, unfortunately STILL considered a commercial product - Knauf is one, and Insulco in Australia - Knauf is primarily Euro, but has outlets worldwide.
Other products, like mineral wool and rockwool (some of which are regurgitated floor sweepings from metal manufacturing) have different physical properties and somewhat different acoustic properties as well. Rockwool is actually just a trade name for mineral wool. There is also a product called slag wool, which is the byproduct of metal manufacturing if I remember correctly.
For the inside of acoustic walls, ANY insulation with approximately 3 pounds per cubic foot density seems to fill the bill. It works better if it lightly contacts the inside of the wallboard, because damping the wallboard reduces the Coincidence Effect that partially "shorts out" sounds in the 2-4 kHz range.
For uses that require the insulation to be "in the room" with us, acoustically the fiberglas versions seem to have slightly better balanced absorption and are a bit more manageable.
Other than that, you're pretty much on your own for sources. One other option, if you're desperate, is that Ethan Winer now offers a couple choices of 700 series fiberglas on his website -
http://www.realtraps.com/fiberglass.htm
The further you are from Connecticut the less desirable this option - plus, you should be able to do better locally on price IF you can find it. I'm only posting that link as a last option... Steve
The only success we hear about is people calling every commercial drywall/insulation contractor in a 40 mile radius of their location and asking about it. When members of this forum do that, we REALLY appreciate their posting the results (if positive) in the Materials forum so others can benefit.
There are other nearly identical products available, unfortunately STILL considered a commercial product - Knauf is one, and Insulco in Australia - Knauf is primarily Euro, but has outlets worldwide.
Other products, like mineral wool and rockwool (some of which are regurgitated floor sweepings from metal manufacturing) have different physical properties and somewhat different acoustic properties as well. Rockwool is actually just a trade name for mineral wool. There is also a product called slag wool, which is the byproduct of metal manufacturing if I remember correctly.
For the inside of acoustic walls, ANY insulation with approximately 3 pounds per cubic foot density seems to fill the bill. It works better if it lightly contacts the inside of the wallboard, because damping the wallboard reduces the Coincidence Effect that partially "shorts out" sounds in the 2-4 kHz range.
For uses that require the insulation to be "in the room" with us, acoustically the fiberglas versions seem to have slightly better balanced absorption and are a bit more manageable.
Other than that, you're pretty much on your own for sources. One other option, if you're desperate, is that Ethan Winer now offers a couple choices of 700 series fiberglas on his website -
http://www.realtraps.com/fiberglass.htm
The further you are from Connecticut the less desirable this option - plus, you should be able to do better locally on price IF you can find it. I'm only posting that link as a last option... Steve
Soooo, when a Musician dies, do they hear the white noise at the end of the tunnel??!? Hmmmm...
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giles117
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Hey Knightfly, this was my reason for going the rockwool way....
2" is what I used in the Roxul RHT-40 for my live room walls
703 ASTM C 423
________ 125 250 500 1000 2000 4000 NRC
703_____ .17 .86 1.14 1.07 1.02 .98 1.00
RHT-40___.26 .68 1.14 1.13 1.06 1.07 1.00
Had i used 3" Roxul RHT-40 These are the specs
_______ .62 1.03 1.20 1.10 1.08 1.10 1.00
And at the price point I won't miss it. 18 difference in coef. at 250 does not cause me to get nautious.
the 4" is even more even. I Used this on the rear of my control room
______ 1.07 1.01 1.07 1.06 1.07 1.06 1.05NRC
2" 703 runs .74 / sq ft and RHT-40 runs .25 cents (2") / sq.ft to .41 cents (4")
2" is what I used in the Roxul RHT-40 for my live room walls
703 ASTM C 423
________ 125 250 500 1000 2000 4000 NRC
703_____ .17 .86 1.14 1.07 1.02 .98 1.00
RHT-40___.26 .68 1.14 1.13 1.06 1.07 1.00
Had i used 3" Roxul RHT-40 These are the specs
_______ .62 1.03 1.20 1.10 1.08 1.10 1.00
And at the price point I won't miss it. 18 difference in coef. at 250 does not cause me to get nautious.
the 4" is even more even. I Used this on the rear of my control room
______ 1.07 1.01 1.07 1.06 1.07 1.06 1.05NRC
2" 703 runs .74 / sq ft and RHT-40 runs .25 cents (2") / sq.ft to .41 cents (4")
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giles117
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