Hi Ian,
A great resource for you in the Colorado area is John Hatfield of Energywise Sustainable Products in Littleton, CO. He can be reached by phone at 303-877-0594 or by email at
[email protected]. He has done several earth sheltered projects and has some great resources and contacts that I'm sure will help you a lot.
Check out the project profile for an earth sheltered home at http://www.quadlock.com/concrete/forms/Earth_Sheltered_ICF_Home.pdf.
If there is any additional information about ICF, I would be happy to help.
Feel free to contact me by phone or email at 1-888-711-5625 ext. 204 or
[email protected].
Lisa Little
Quad-Lock Building Systems
Customer Service