I made these sketches for my longtime collaborator and friend, Polly Bart. After a couple of decades as a green builder, she is building a house for herself using all natural and salvaged materials, including trees harvested from her land, strawbale walls, a green roof, and—possibly best of all—a thatched roof over the main living room’s steeply pitched log structure. Last month, the master thatcher came from Ireland to put up the roof. The photos of it are stunning. (Scroll down this post for a slideshow of six images, or follow this link for more.)
This morning, I awoke from a dream of her roof, thinking about the differences between a roof like this and conventional construction. Modern construction technology favors industrial materials put up in layers, each with its specialized purpose: structure, enclosure, water shedding, waterproofing, insulation, and to bridge and/or seal thermal movement of the different materials. Thatch, by itself, takes care of all of those purposes save the structure. Great skill and long training are required to do it correctly. Continue reading






