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mwools 04-02-2010 07:14 AM

concrete slurry ceiling insulation?
I desperately need some advice on a shed/music space currently going up in the backyard...The structure is made of weatherboard and plasterboard/drywall panels with a thin inner layer of polystyrene covered in a polystyrene bead and concrete slurry mix as a type of insulation. The reason for the slurry is its soundproofing capabilities.
The ceiling of this 3x3 metre space is made up of 6 panels; each 1 by 1.5 mtres long. Each of these has an extra joist down its centre. In addition, a beam runs along the length of the space, supporting each of these ceiling panels. My worry is each of these panels is also filled with a concrete slurry/poly bead mix-the weight is aprox 11k per square metre. Is this too heavy?
Has anyone ever heard of this kind of insulation for a ceiling? My understanding is that rockwool is around 6 k per square metre in weight.
Any help would be greatly appreciated..

Scuba_Dave 04-02-2010 08:10 AM

Where are you located ?

mwools 04-02-2010 06:18 PM

Location added to profile..
I'm located in Melbourne, Australia...

Gary in WA 04-02-2010 09:17 PM

"Join Date: Apr 2010 Location: Melbourne, Australia
Posts: 2"

You keep doing that, Dave, lol. I'm not familiar with that construction, ask your local building department. Or go to a sound control forum? Doesn't the contractor know? Is the slurry on a wire lath?

Be safe, Gary

Scuba_Dave 04-02-2010 09:39 PM


Originally Posted by GBR in WA (Post 423332)
"Join Date: Apr 2010 Location: Melbourne, Australia
Posts: 2"

You keep doing that, Dave, lol.
Be safe, Gary

Uh..yeah...and after I ask they update their profile :huh:

mwools 04-03-2010 04:14 AM

Thanks for the reply Gary. The cement isn't on a wire lathe and unfortunately theres no contractor as it's a small backyard job being built by a friend.
I know it's an unusual insulation material for the ceiling..think I'll call the drywall manufacturer to find out what the max recommended load is..
Thanks again

Gary in WA 04-03-2010 04:39 PM

I may be wrong... 2.2# for 5/8" drywall?

Be safe, Gary

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