With some initial design support from Sigi Koko at
Naturally, David spent seven years of evenings and weekends
working on the 4,000 square foot (370m2) straw bale house with help from local artisans and craftsmen.
The house is in Hellam Township, Pennsylvania, USA built from
bamboo, cork, stone and
roundwood with a green roof of desert sedums that can be
reached from the first floor, a design feature recommended by
Christopher Alexander in
[Thanks to photographer
for the pictures].