Greenhomebuilding.com E-zine #11 April 30, 2003
 
Contents
*A Tale of Two Houses
*Site of the Month
*Upcoming Conferences
*General and Unsubscribe Information
 
Greenhomebuilding.com E-zine is a monthly opt-in email publication for people who are interested in sustainable architecture and alternative or natural building. It is written by Kelly Hart, the host of www.greenhomebuilding.com
 
A Tale of Two Houses
Over the last year I have had the opportunity to help two women who are building houses in our community design their dream homes. I had offered myself as a designer/consultant to assist them in coming up with designs that are based on concepts of sustainable architecture and embrace their particular needs and esthetics. While being creatively satisfying, the process of doing this has also been an education in non-attachment to realizing any particular outcome.
 
The first project was rather collaborative in nature. This woman had a basic floor plan in mind when she came to me, but had many questions about specific aspects of the design, related to appropriate materials, window and vent placement, structural design and integrity, etc. Over a period of several weeks, I periodically met with her  to discuss the various options, and the design began to take more concrete shape. We settled on a passive solar design, with the wall structure to be primarily earthbags filled with crushed volcanic rock and then plastered with papercrete, similar to my house. But instead of the dome arrangement that I used for my house, she wanted a more traditional wood framed roof structure.
 
I came up with an off-set peak roof design that provided a substantial bank of clerestory windows to light and help heat the northern aspect of the interior, as well as to provide ample ventilation for the greenhouse area that would be on the south side. Large natural poles would support this central ridge, and then rafters would angle down on either side to rest on the earthbag perimeter wall. The southern aspect of the house would be rectangular, but the northern side would be semi-circular and would be substantially bermed with soil.
 
Once we settled on this design and it was approved by our local architectural committee (we live in a covnented community), she could proceed with the work of actually building her house. She hired laborers as needed, and Providence provided her with an experienced earthbag builder: Juli Jones, who with her husband Jacob, had built a small earthbag cabin in Spain (featured in Green Home Building E-zine #8 and can be seen here: http://www.greenhomebuilding.com/earthbag.htm#cabin ).
 
I would occasionally stop by the building site to offer moral support or advice, but mostly the work proceeded without much input from me. I had given her a detailed listing of all the important steps to realize her design, as well as a set of detailed, scaled drawings. The walls were up to about three feet when Rosana and I left for a two-month vacation travelling in Mexico. I would get sporadic emails from her as we travelled, suggesting that the design was being modified in various ways, as she received advice from various people that she was working with. When I returned from the trip, I was surprised to see that the clerestory windows were completely eliminated, the glazing arrangement for the greenhouse was substantially altered, and various, less dramatic, changes or omissions had been made.
 
So I have learned that, at least in this instance, the evolution from design to actual building can become a rather collaborative affair. While she liked her original design, she was not emphatic that it be implemented precisely, so as the building proceeded, other peoples ideas would sometimes prevail. I'm sure that she will ultimately be happily living in her house, but it will probably not perform in quite the way that I had envisioned. I built my house almost entirely by myself, and I made many changes from the original plan as I did so, but ultimately the collaboration was just between Rosana and myself. When more people get involved in the collaborative process, the final building is likely to be less cohesive.
 
The second design project with Alice was more challenging and somewhat more creative, in that she really had the bare minimum of an idea of what she wanted. She gave me a simple sketch that showed an oval shape, with some written functions roughly scattered within it. I went to the building site with her, and we walked around, feeling the space and talking about where a little house might best fit into the landscape. We focused on a nice south-facing slope that would protect her from the prevailing winds.
 
I met with the second woman several times to talk about various ways to incorporate what she wanted into a design, and she was generally enthusiastic about the ideas that I presented to her. As a concept began to coalesce, she was approving, and her main suggestions had to with specific windows that she had and wanted to incorporate.
 
I used this opportunity to come up with a design that I felt would be especially well-suited to her land, and would rank quite high regarding sustainable architecture. It would be an oval shape, with the walls being vertical and made of two side-by-side stacks of earthbags. The outer layer of bags would be filled with the crushed volcanic rock for insulation, and the inner layer would be filled with the soil from the site to serve as thermal mass. The most experimental part of the design was the roof, which would be both tensile and compression, with poles radiating out from a central steel hoop that would be supported by a branching tree. A large openable circular dome skylight would be attached to the steel ring. Then the radiating poles would help support an insulated earthbag/papercrete roof. In our rather dry climate, such a roof structure should work fine, since it is really quite similar to what I have been living in for for several years.
 
I handed over a complete set of scaled and detailed plans for this house to her just before we left for the Mexican trip. While we were gone she showed the plans to some other people who had some building experience, but not with earthbags, who advised her that what I designed was too radically experimental and possibly unsafe. She began to have second thoughts about the design, and ultimately decided to have someone else draw up crude plans for a very conventional rectangular straw bale building. This new design will not fit nearly so nicely into the landscape of her site, cost considerably more to build (since it will need a conventional foundation and roof structure), and not be so environmentally benign as the original design. What puzzles me about this is why she asked me to design her house in the first place, knowing what my interests and experience were.
 
It happens that these two project were for local people, but I have done other design or consulting work for people at a distance, using the internet, phone, fax, and mail. I enjoy this sort of work, since I like the challenge of conceptualizing  something that fits a given set of needs, and to do so in an aesthetically pleasing manner.

Site of the Month
The ECOSA Institute in Prescott Arizona, www.ecosainstitute.org, offers a 3 month immersion program in Ecological Design/Architecture that may be worth up to 15 credit hours with an articulation agreement between schools. ECOSA prides itself on teaching sustainability with real life projects to fill in the missing link in architectural curriculums today that may have only one class in ecology or sustainability, if any, throughout the program.  Contact Tony Brown or Rob Israel at ECOSA (address and phone on their website).
 
Upcoming Conferences
 
I am pleased to announce a couple of conferences that I will be involved with:
 
The Natural Building Colloquium of 2003 will be held October 5-11 at the Black Range Lodge in New Mexico. I will be discussing sustainable architecture and hybrid earthbag/papercrete building. Contact Catherine Wanek blackrange@zianet.com for more information.
 
The 2nd International Vittachi Conference will be held in Crestone, Colorado on August 3-10. Open for young adults, 18 to 35, interested in exploring a sustainable approach to housing, the environment, business, spirituality and the arts. I will be teaching earth bag building techniques. Register on line at www.humanfutureproject.org.

General and Unsubsrcibe information 
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Kelly Hart