Originally Posted by Budzien
Insulated Concrete Forms? I've heard of them, but that's where my knowledge ends.
Check out that link I posted above. Rastra is a ICF (Insulated Concrete Form) made from recycled plastic and concrete. You dry-stack the forms (Easy DIY task) and when you're all done, you fill the void with concrete. Makes for a very durable, well-insulated space. It's fire resistant, moisture resistant, varmint resistant and termite-proof.