Try to get an MSDS on the product.This would tell you without question whether 
it is fire retardent or not.

 Lamar Vaughn , SET


---- "A.P.Silva" <[email protected]> wrote: 
>  
> I have a 14" deep open web wood truss floor space filled with "blown
> Cellufibre sound attenuation insulation". Anyone know whether this
> insulation is "non-combustible" complying with a combustible concealed space
> permitted by NFPA to be unsprinklered? They claim the insulation is fire
> retardant. But I'm not sure. 
> 
> Tony  
> 
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