This is Heidi’s cottage, ‘Elaman Puu’, which means Tree of Life. It’s built with a variety of natural building techniques with a rubble trench, earthbag stem walls dressed in stone, birch bark damp-proof membrane beneath the straw bales on the northern walls with cob and cordwood to the south and a reciprocal roof on a roundwood frame. All of the materials were harvested locally…” – Natural Homes