Rigid fiberglass prices way up?

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SkullChris
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Rigid fiberglass prices way up?

Post by SkullChris » Mon Apr 13, 2009 11:14 am

Howdy all, I was just calling around getting some price quotes from local insulation suppliers on the price of 2" 2x4 3.0pcf panels and I was rather surprised by the prices I was getting. I only found two suppliers in the area that had what I needed, and one quoted me at $12.24 per panel, and the other at 1.40 per square foot ($11.20 per panel). When I was looking around at some old threads I was finding a lot of quotes at around $7-8 a panel, and that's also what a friend of mine paid a few years back. So has this stuff dramatically risen in price or am I looking in the wrong places? -Chris
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Post by curtiswyant » Mon Apr 13, 2009 12:28 pm

Holy shit! Granted, I haven't bought insulation in about 3 years, but last time I checked it was $.26/sqft for 2" 6pcf rockwool with foil backing. What brand are you looking at? I've found OC overrated and overpriced when Roxul/rockwool will work as good or better.

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Post by SkullChris » Mon Apr 13, 2009 12:39 pm

The brands I was quoted on were Knauf and Johns Manville.
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Post by leecow » Mon Apr 13, 2009 1:18 pm

2" Roxul 60 are $10 ea from ATSAcoustics though shipping is a bit of a killer.
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Post by MoreSpaceEcho » Mon Apr 13, 2009 4:30 pm

i don't remember exactly but i wanna say johns manville 814 was about 11-12 a sheet last time i bought it, sometime in 2007...

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Post by Snarl 12/8 » Mon Apr 13, 2009 6:10 pm

I just called a place here in Portland. They're selling 3" thick Roxul Mineral Wool for $0.58 per sq. ft. That seems like a good deal to me. I think I'm gonna go get some tomorrow. How does 3" of Mineral Wool compare audio absorbtion-wise to 2" rigid fiberglass? If you need more to do the same job it might be a wash.
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SkullChris
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Post by SkullChris » Mon Apr 13, 2009 6:26 pm

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

Found this link on the John Sayers forum, and I'm now definitely gonna call tomorrow on the prices of the Roxul. If it's even twice as much here that's still a better deal than the rigid fiberglass and it seems to do an equivalent if not better job. I'll keep everyone informed.

Is there a downside to working with mineral wool though? I've read that it's not as rigid as the fiberglass and more difficult to work with. This could be a big deal because I was not planning on making frames for these so much as just wrapping them in fabric and screwing them to furring strips to attach to the wall. Would this still be feasible? -Chris
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curtiswyant
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Post by curtiswyant » Mon Apr 13, 2009 6:46 pm

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

Found this link on the John Sayers forum, and I'm now definitely gonna call tomorrow on the prices of the Roxul. If it's even twice as much here that's still a better deal than the rigid fiberglass and it seems to do an equivalent if not better job. I'll keep everyone informed.

Is there a downside to working with mineral wool though? I've read that it's not as rigid as the fiberglass and more difficult to work with. This could be a big deal because I was not planning on making frames for these so much as just wrapping them in fabric and screwing them to furring strips to attach to the wall. Would this still be feasible? -Chris
Get the stuff with foil backing. I made frames for mine but it would work without as long as you're not moving them too much. The specs speak for themselves...roxul is the way to go.

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digitaldrummer
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Post by digitaldrummer » Mon Apr 13, 2009 6:46 pm

Rock wool is usually not rigid, but you can easily build some frames and its still cheap. also look at the recycled cotton batting which is much like rock wool but without the itch. I only can think of "insulcot" but I know there is another brand too.

here's some ideas if you build frames

http://www.digitaldrummer.net/basstraps.htm


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Snarl 12/8
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Post by Snarl 12/8 » Tue Apr 14, 2009 1:06 am

digitaldrummer wrote: "insulcot"
Ultratouch.
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Post by SkullChris » Tue Apr 14, 2009 6:00 am

Alright, so I called my building suppliers this morning and got some great news. I was able to find 2" 8.0pcf mineral wool for $.70sf & 4" 4.5pcf for $1.12sf. I'm now paying almost half of what I would have buying the rigid fiberglass. Thanks a ton e'rybody! -Chris
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vikingrecording
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Post by vikingrecording » Tue Apr 14, 2009 6:10 am

That's awesome, Chris!
I don't think i have any plans Friday night if you want to work on your room.

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SkullChris
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Post by SkullChris » Tue Apr 14, 2009 6:53 am

Ah, but if you cross reference the Richmond thread, you'll see that I will be out of town Friday. Maybe sunday? Whatever, I'm just gonna call you. -Chris
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vikingrecording
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Post by vikingrecording » Tue Apr 14, 2009 7:09 am

Cross-Reference? Bah!
who do you think i am?

Call me, im going to be at SOM tonight and tomorrow night, elbow deep in patchbay spaghetti!

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Post by DryCounty » Tue Apr 14, 2009 1:51 pm

I know it's late to comment here but I ordered six 2x4 (foot) pieces of 2" 703 from ATS for about $68 last year but if I can find something similar for cheaper that's also local I'll go there. Name your source, Chris!
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