John Sayers' Recording Studio Design Forum Archive

That probably depends on the seller - I deal with a few companies locally that give me my company's discount and let me pay by my own credit card, no problem. Also, part of the reason yours is higher priced is the density - 6 PCF stuff is more money than the normal 3 PCF, and for most things not as good... Steve

Good point steve, I totally overlooked he was talking about 705

I was talking about 703

Bryan Giles

I wrote a check for it off my company acct.

anybody find any in or near New Orleans, LA.

I'm trying to see if Lowes can order this because they carry the Brand:

http://www.jm.com/wwwroot/insulation/pr ... shield.pdf

or if Home Depot can order the OC 703 because they carry the Brand:

http://www.owenscorning.com/comminsul/d ... Series.pdf

oooohh. you were looking for this:

http://www.knauffiberglass.com/

Hey I just found this company. I'll give them a call on Monday.

http://assi-br.com/

Is Mineral fiber the same thing??

I'll buy from rockwool, they have very wide product range, so I'm a bit confused. Do you know what exact Rockwool product is "THE ONE" ;-).

Is it the one that is bendable and somewhat soft, or it is panel like thing you can only broke and there is no way to bend it?

thanks
Matous

from my limited experience it depends on what company you buy from, but the density is the issue. Not wether it comes apart ro stays together without much effort.

I Used some old Owens Corning and some New Roxul AFB, Both had a Density of 3pcf, just the Roxul would flake apart easier, but the density felt the same.

From what I have gathered, the issue is how long the fibers are and how they are spun together when making the Batts.

Bryan Giles

www.Roxul.com

Here are 2 quotes from Roxul

ROXUL® products are mineral wool fiber insulations made from basalt rock and slag.

ROXUL AFB™ (Acoustical Fire Batt) is a batt insulation product designed specifically for application in wall/floor systems where acoustical performance and fire resistance are the primary concerns. This non-combustible lightweight product has excellent acoustical dampening properties and is dimensionally stable which makes it ideal for friction fit into wall partitions and system applications from party walls to plant/manufacturing walls.

Here are some acoustical properties:

Acoustical Performance:
ASTM C423
CO-EFFICIENTS AT FREQUENCIES
Thick 125 250 500 1000 2000 4000 NRC

1.0" 0.14 0.25 0.65 0.90 1.01 1.01 0.70
1.5" 0.18 0.44 0.94 1.04 1.02 1.03 0.85
2.0" 0.28 0.60 1.09 1.09 1.05 1.07 0.95
3.0” 0.52 0.96 1.18 1.07 1.05 1.05 1.05
4.0” 0.86 1.11 1.20 1.07 1.08 1.07 1.10

Density:
Thickness <= 1.5” (40 mm) = 48 kg/m 3pcf
Thickness => 2.0” (51 mm) = 40 kg/m 2.5pcf



They Also make a Product called Roxul Safe/ Which is a Semi-Rigid Product.

ROXUL SAFE® product is a non-combustible, lightweight and water repellent semi-rigid insulation batt that provides fire stopping and acoustical insulation properties.

Acoustical Performance:
ASTM C423
CO-EFFICIENTS AT FREQUENCIES
Thick 125 250 500 1000 2000 4000 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

Density:
ASTM C 303 4.5 lbs/ft (3)

Has anyone used this stuff? Its called Select Sound Black Board from Owens Corning. It's supposed to be a step up from 703. Here is a link to a PDF about the product.

http://www.owenscorning.com/around/soun ... ACKAC1.PDF -

You have to be a contractor to buy it, or so they say at Owens Corning. What do you think?


Steve

http://www.isover.it/prodotti_pareti.asp

Search for a board called "MUPAN". You can find the 50mm (2") version for as little as 3.80€ and it rocks.

For Aussies in the Newcastle/Hunter looking for the Owen's Corning 703 equivalent, you can find Insulco Semi-Rigid Glasswool at Cardiff.

Give Matt a call on 1300 361 230. He's a friendly bloke and can tell you sizes and prices. It's cheap

I have been doing a fair bit of research in terms of sourcing materials in Australia comparable the Corning products cited as being the most appropriate for the construction of bass-traps and panel absorbers.

Bradford Insulation have a downloadable pdf format product guide for their rigid fibreglass products which includes coefficients of absorption for a range of frequencies available here:-

http://www.bradfordinsulation.com.au/te ... tguide.asp

just click on the "Industrial Glasswool" link to download the data.

Hope you find it useful.......

and a decent comparison chart of materials from around the world:-

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

Look under 'Insulation' in the yellow pages.