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[Cob] Lava RockJanet Standeford janet.standeford at gmail.comTue Jul 19 00:38:32 CDT 2011
The other folk that built with pumice cob in Victoria have a website www.eco-sense.ca and I think there is something on there about the R-value of their cob, as they are all set up with sensors in the walls. Actually, they claim .5 R value for regular cob and 1 per inch for pumice cob but actually the energy model done for regular cob is R19 for 20 inches so i don't think the additional hassle of pumice really adds anything unless their cob mix is vastly different.
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