1] Bird's-eye view of the low-cost earth shelter, near completion. [2] A curved top plate must be cut from 2 X 12 to go above the kitchen windows. [3] A Squangle in use. [4] Beams were end-nailed through the first cross rafter. [5] From behind the building, you can see the first layers of waterproofing. [6] Rafters in place above the bisecting wall. [7] The interior partitions must bend to fit the conical rear roof.