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Vermiculite Vs Perlite
From the WFO board
Posted by Ed and Heidi Cobleigh on October 17, 2004 at 06:08:17:
In Reply to: Vermiculite Vs Perlite posted by August V. on October 15, 2004 at 09:21:16:
We used Vermiculite for the insulating concrete on the dome and poured loose Perlite between the finished, concreted dome and the outside walls. Seems to work fine.
In California, Perlite is one dollar a bag (35 #)cheaper than Vermiculite, we used the agricultural grade. Perlite looks like it would have a higher insulating rating than vermiculite.
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