Cob: Re: Cob Insulation

[Keftydia at aol.com]

This may be a silly idea, but it's something I've been wondering about.  Has 
anyone thought of using old plastic soda bottles for insulation?  Admittedly 
it would take a lot of them, but could embedding the 20-oz, 2 liter, or 3 
liters bottles in a cob wall contribute to increasing insulation in cob?  I 
read in the archives once (I think) that one couple insulated their roof 
using old cardboard milk cartons.  I realize the plastic bottles aren't 
exactly the most ecologically conscionable things, but finding a way to 
insulate with them would at least provide a method of putting them to use (as 
opposed to ending up in a landfill).

Ron Cameron