I'm playing with my first rocket mass heater build, and I have a question about insulation. When using vermiculite or perlite, do I have to use clay slip with it, or is that just to stick it together? I'm planning on completely enclosing the insulation container and would rather not have to mess with clay slip if there isn't a real need. Thanks for any info.
"People may doubt what you say, but they will believe what you do."