Sustainable design and construction:Dug into hillside for low visual impact and shelter Stone and mud from diggings used for retaining walls, foundations etc. Frame constructed of fallen trees from surrounding woodland Reciprocal roof rafters are structurally very easy to do Straw bales in floor, walls and roof for super-insulation and easy building Plastic sheet and mud/turf roof for low impact and ease Lime plaster on walls is breathable and low energy to manufacture compared to cement Reclaimed {scrap} wood for floors and fittings Other items were reclaimed from “a rubbish pile somewhere”: windows, wiring, plumbingMaybe there should be a new rating just for building so inexpensively: Sustainable Financing.
greenbuildingelements.com/2008/12/01/hand-build-an-earth-sheltered-house-for-5000/