#11  
Old 06-24-2010, 05:22 PM
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Default Re: Molding vermicrete

All perlite sold at nurseries will be "popped" or expanded. What use is it an any other form ?

I tried to see which of the boxes on the bag in your photo were checked off. Perlite often comes in "fine". "medium" and "course". You want the "coarse" grade.

Last edited by Neil2; 06-25-2010 at 11:03 AM.
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  #12  
Old 06-24-2010, 05:40 PM
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Default Re: Molding vermicrete

I checked with the local masonry supplier and they only carried them in fine form so I went ahead and picked up the medium aggregate from Home Depot. I'm not using it for insulation, but just for forming and molding. I think this will work just fine.

Thanks,
George
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  #13  
Old 06-29-2010, 06:33 PM
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Default Re: Molding vermicrete

Can I add lime to the perlite/cement mix? Would that make molding easier, as far as making the mixture sticky? I just happen to have a lot of lime left from doing the homebrew.

George
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  #14  
Old 06-29-2010, 06:56 PM
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Default Re: Molding vermicrete

Sure you can, but I wouldn't go past 1:1 with portland if you are planning on troweling a finish coat over it.
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Old 06-29-2010, 07:40 PM
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Default Re: Molding vermicrete

Perfect. I'll do that.

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George
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  #16  
Old 06-30-2010, 08:25 AM
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Default Re: Molding vermicrete

Hi lads
I,m ready to pour vermiculate base but could only get medium grade ie 2-5mm. Will this be ok or should i continue to look for course grade.
Tom
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  #17  
Old 06-30-2010, 11:22 AM
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Default Re: Molding vermicrete

"only get medium grade ie 2-5mm. "

That will work fine. Hand mix gently to avoid breaking up the vermiculite particles.
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  #18  
Old 07-01-2010, 05:39 AM
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Default Re: Molding vermicrete

Thanks Neil
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