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From: Tim Padrick on 8 Nov 2007 23:26
I don't think open fiberglass will be healthy (airborn fibers), and may not
meet code. Have look into
http://www.internationalcellulose.com/home/products/k-13/

<Slim(a)SarasotaSlim.com> wrote in message
news:1194579946.409855.58030(a)k79g2000hse.googlegroups.com...
> On Nov 5, 12:17 pm, bigsph...(a)gmail.com wrote:
>> I have a 70' x 35' room that I intend to use as a performance hall,
>> for music ranging from noisy metal bands to acoustic/chamber music.
>> Concrete floor, 12' high concrete-block walls. The roof is 18' high
>> in the middle. We'll put in thick fiberglass insulation on the
>> ceiling, and leave the rafters open (A/C duct and main house speakers
>> will go up there too).
>>
>> The concrete floor will remain uncovered, but we obviously need to
>> treat the walls. I've been advised to install 4' x 8' sheets of
>> styrofoam insulation over most of the wall, and to cover them with
>> fabric to make it all look better. (I plan to use thick stage
>> curtains behind the stage and on either side of the audience, so that
>> I can expose the bare walls as needed during acoustic shows.)
>>
>> Has anyone here installed foam panels in this way? What kind of
>> fabric did you use? How did you attach the fabric to the foam, and
>> the panel to the wall? How durable did it turn out to be? Did it
>> dampen the sound as much as you'd hoped?
>>
>> Or, does anybody have some better ideas for treating these walls?
>
> As others have mentioned - the styrofoam is not good - probably
> illegal - and only good for keeping things cool or hot. A lot of
> people in our area use wet blown cellulose. It's often blown into the
> rafters and spray painted flat black. They add a fire retardant and
> it's hard to notice it at all when the lights dim. Also about those
> ducts. A club on the other coast has these way-cool cloth ducks that
> poof out when air is forced into them and they just hang there when
> it's off. They can be removed for washing. The best part is they're
> quiet while in use. They're just big sealed cloth sacks that hang and
> the air is forced through them. Many years ago there was a company
> that made a plastic strip thing called "Fab-u-track" and it would hold
> fabric like a stretched canvas. Some kind of white 1/2" puffy stuff
> was stapled to the walls in back of the fabric. We did a big
> corporate office in Tampa with it about 25 years ago.
>


From: G on 9 Nov 2007 09:01
In article <1194579946.409855.58030(a)k79g2000hse.googlegroups.com>, Slim(a)SarasotaSlim.com wrote:
>On Nov 5, 12:17 pm, bigsph...(a)gmail.com wrote:
>> I have a 70' x 35' room that I intend to use as a performance hall,
>> for music ranging from noisy metal bands to acoustic/chamber music.
>> Concrete floor, 12' high concrete-block walls. The roof is 18' high
>> in the middle. We'll put in thick fiberglass insulation on the
>> ceiling, and leave the rafters open (A/C duct and main house speakers
>> will go up there too).
>>
>> The concrete floor will remain uncovered, but we obviously need to
>> treat the walls. I've been advised to install 4' x 8' sheets of
>> styrofoam insulation over most of the wall, and to cover them with
>> fabric to make it all look better. (I plan to use thick stage
>> curtains behind the stage and on either side of the audience, so that
>> I can expose the bare walls as needed during acoustic shows.)
>>
>> Has anyone here installed foam panels in this way? What kind of
>> fabric did you use? How did you attach the fabric to the foam, and
>> the panel to the wall? How durable did it turn out to be? Did it
>> dampen the sound as much as you'd hoped?
>>
>> Or, does anybody have some better ideas for treating these walls?
>
>As others have mentioned - the styrofoam is not good - probably
>illegal - and only good for keeping things cool or hot. A lot of
>people in our area use wet blown cellulose. It's often blown into the
>rafters and spray painted flat black. They add a fire retardant and
>it's hard to notice it at all when the lights dim. Also about those
>ducts. A club on the other coast has these way-cool cloth ducks that
>poof out when air is forced into them and they just hang there when
>it's off. They can be removed for washing. The best part is they're
>quiet while in use. They're just big sealed cloth sacks that hang and
>the air is forced through them. Many years ago there was a company
>that made a plastic strip thing called "Fab-u-track" and it would hold
>fabric like a stretched canvas. Some kind of white 1/2" puffy stuff
>was stapled to the walls in back of the fabric. We did a big
>corporate office in Tampa with it about 25 years ago.
>

First thing to do is not fill in all the holes in the blocks. Spraying the walls
will help prevent this rather than coating. If the blocks are allready smooth, forget that.
Cellulose is now used with a binder to perform a self stick, much like spraying expanding
foam. Check into this.

greg
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