In the mid-70’s Cliff Shockey of Vanscoy, Saskatchewan, Canada decided to build and energy efficient home of cordwood, but since he lived where the temps would go down to -50, he decided to build “double wall.”
He built a post and beam framework and laid up 8″ of cordwood on the outside. Then he put 12″ of stiff fiberglass insulation (there are many insulation choices) and then another 8″ of interior cordwood. He had 20″ of wall with an R-value approaching R-50. Cliff won the Harrowsmith award for Energy Efficiency in 1997. His design continues to inspire folks to this very day.
A number of folks thought this was a good idea and decided to build double wall and try and improve on Cliff’s design.
Clint & Cindy Cannon of Austin, Manitoba built a beautiful double wall and strawbale (balewall). They speak glowingly of 10 winters of lower heating bills with their home overlooking Antelope Valley.
Bruce & Nancy Kilgore built a trapazoidal structure in upstate New York with double wall. Where Cliff went all the way with his mortar, Bruce and Nancy used 3″ of mortar, 2″ of sawdust insulation and 3″ of mortar on each side of their double wall creation.
Greg and Clare are building a wonderfully unique double wall home near Houghton, Michigan. They are using Lime Putty Mortar and blown in foam for a higher R-value.
Grant & Kiera Nicholson have a gorgeous double wall cordwood home in Owen Sound, Ontario. They experimented with a slip form technique for speeding up the cordwood process and now use the main room of the house as a music and recording studio.
Here is the non-energy nose-bleed foundation that Grant constructed.
This is just a beautiful-as-can-be arched door at the Nicholson’s double wall cordwood home. Grant runs a design business and can be reached at www.gnicholsondesign.com
Alan Stankevitz’s double wall beauty near LaCrescent, Minnesota is an excellent example of double wall with renewable energy. Alan is almost at a break even point when it comes to energy used and energy produced. You can learn more about Alan at www.daycreek.com by going to the Journal.
All of these stories are written about in the Cordwood Conference Papers 2005 and/or 2011. The attention to detail and the sweat equity of each project is significant and profound and needs to be seen to be believed.
The only Double Wall book on the market has been written by Cliff Shockey and is available in ebook, print and CD format at the Online Cordwood Bookstore at www.cordwoodconstruction.org
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Interested in the latest literature on cordwood? Click on the book cover to be taken to my cordwood construction website and online bookstore.
Merrill, Wisconsin, USA