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-   -   Vermiculite or Perlite, what's the difference? (http://www.fornobravo.com/forum/f28/vermiculite-perlite-whats-difference-7160.html)

DimTex 07-03-2009 11:50 AM

Vermiculite or Perlite, what's the difference?
 
I placed my order for the supplies to start my project and the masonry supplier only carries Perlite. Is that the same as vermiculite? I asked if it was silicone coated and he said no, but I am not sure if the guy would have known in the first place.

Neil2 07-05-2009 03:36 PM

Re: Vermiculite or Perlite, what's the difference?
 
Perlite will do the same job as vermiculite. Perlite is a "blown" rock.

Make sure it is the coarse grained perlite. Particles should be in the order of 1/8 to 1/4 inch or so.

I used half vermiculite / half perlite in my insulating layer.

dmun 07-05-2009 06:59 PM

Re: Vermiculite or Perlite, what's the difference?
 
Perlite works fine. It's what I used, and I didn't have any grains as big as quarter inch. It has the advantage, being white, of having a visual indication of when it's fully mixed with the portland.

timo 07-06-2009 06:45 PM

Re: Vermiculite or Perlite, what's the difference?
 
I just finished working with perlite and can report that it's easy to work with and mixed well with the portland. I dry mixed the portland and perlite then added water and it mixed well. With a 5:1 perlite to portland ratio I used 8 cubic feet of perlite to about a bag of portland. Hope this helps :)

DimTex 07-07-2009 08:17 AM

Re: Vermiculite or Perlite, what's the difference?
 
Thanks for the information

David


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