A double stack wall is a great idea for cold climates. When the wood shrinks, and it will, the foam, and or plywood, would help reduce drafts. Foam is best insulator, but man made product, that is toxic and highly flammable.
epoxy resin wood - Google Search
Chalet du Golf by Bo Design
Here is an idea for the people, who are planning to renovate the kitchen and it can save the money because the reclaimed wood pallet kitchen cabinets can be created easily investing some time, not the money if the pallets are already available at home.
Cordwood Cabin Building Blog
Porch Swing Frame Plan | BUILDING PLANS FOR PORCH SWING FRAME | House Design