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Wood is good.  It’s durable, sustainable (if properly attained, of course), widely available, and beautiful.  Next week, I’ll be helping a friend deconstruct an old farmhouse in Cass County, Iowa, and I’m hoping to snag some of those materials to use in my project.  Here’s an exploded axonometric drawing of the six components of the structure (floor, roof, and four walls):


As illustrated in my “Materials” post, the structure is composed of two layers of 2×4 framing; it may require additional material, but it improves the quality of the building envelope considerably.  For example, the insulative value of the envelope is doubled, and it helps elliminate thermal bridging.  (Thermal bridging occurs where the interior and exterior sheathing materials are affixed directly to the framing, with no room for insulation, which results in heat transfer and condensation.)  




  1. I love that all this modern thought and technology is being leveraged to create what is essentially a 21st Century cave dwelling. Very, very cool.

  2. Ah, but “cave” denotes darkness. Hold onto your socks; I’ll be posting about lighting soon.

  3. What sort of heat retention are you looking at with that much wood? Do the walls expand out like telescopes? Where’s the kitty door?

  4. Good questions, Lyds.
    Wood doesn’t retain heat nearly as well as concrete or stone, but those materials are also heavier and more expensive (stay tuned for postings about solar thermal hot water).
    The walls are actually five-side boxes that are bolted together; they are interchangeable, but they don’t move, technically.
    This prototype doesn’t include a kitty door; I’m saving that for version 2.0 (your pod).

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