Interior insulation slots cut vertically through natural logs align to form a full wall interior insulation space within the stacked natural log wall. A plank cut out of the interior of each log is used in the interior structure of the building. Solid ends of the logs form corners with intersecting walls. Structural metal posts within the interior insulation space bind the logs together. Foam and vapor barrier insulation fill the interior insulation space. Only the curved natural log surfaces are exposed on the exterior and interior walls.
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