Green Home Building and Sustainable Architecture

Sustainable architecture is an exciting and important field, with many people reviving traditional methods of building and others creating innovations to established practices. Kelly Hart, webmaster of the popular website, posts text and photos featuring what he discovers from around the world.

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Location: Crestone, Colorado, United States

Kelly Hart has been involved with green building concepts for much of his life. He has also worked in various fields of communication media, including still photography, cinematography, animation, video production and now website development. Kelly has lived in an earthbag/papercrete home that he built and consults about sustainable building design.

April 27, 2006

Messages from Mesa Verde

I visited Mesa Verde in Colorado near the Four Corners. This was my first encounter with the “ruins” of the ancestral Puebloan people, progenitors of the Pueblo and Hopi nations. I had heard about Mesa Verde since I was a kid, but nothing could prepare me for the awesome reality. Despite the influx of tourists, there is a peaceful and spiritual quality that persists.

The most famous aspect of what was left behind there are the cliff dwellings, which are certainly magnificent. These finely crafted rock structures emerge from huge alcoves within the cliff faces, and from a distance resemble swallows' nests, fitting into the surrounding rock just as naturally. Actually the cliff houses represent the culmination of about seven centuries of habitation at Mesa Verde. Then around 1300 AD the people abruptly abandoned their homes and moved south and southeast to establish other communities. There is much speculation about why they moved, but the most likely cause was a prolonged period of at least 12 years of drought.

The cliffs were only occupied for the last two centuries at Mesa Verde; before that, all habitation was on the mesa above. At first the people made rectangular pit houses that were dug partially into the ground and then built up with poles and sticks plastered with mud. The entrance was via a hole in the roof with a ladder descending to the floor below. Archeologists believe that from this simple pit house both the freestanding masonry pueblo and the underground circular kiva evolved. The cliff dwellings combined both interconnected pueblo “apartments” and kivas, which were used for ceremonial and community functions. Some of the larger cliff dwellings may have housed over a hundred people. Most of the Mesa Verdeans lived in this communal way, but there were also many smaller housing units scattered throughout the area. It is obvious that they were a very cooperative society.

Little did they know that their style of architecture would become so enormously popular many centuries later. “Pueblo” or “Santa Fe” style building can be linked directly to them. The Spanish introduced modular adobe blocks that make the construction go faster, but the simple stacked rectangular shapes with protruding vigas is native American.

These people were primarily farmers, growing squash, corn and beans in terraced garden plots on the mesa tops. They carefully guided water to their gardens. The mesa itself slopes gently toward the south, which improves the solar gain for gardening, and the colder air slides down the canyons and off the mesa, which increases the growing season.

There is a lot of speculation about why they decided to start building communities within the cliff faces. Some think it was for defensive purposes, although there is little evidence of violence to support this. My sense is that they moved to the cliffs for comfort. Some enterprising individual or family probably tried building a stone house on one of the many cliff ledges that faces south and soon realized that there were many advantages, which were pointed out to the others. Sealing off a cave or cliff alcove with rock walls effectively makes the room a part of the cliff itself. It's like digging into the ground to take advantage of the cool in the summer and the warmth in the winter, but under the rock ledge they were also protected from the rain and snow and had much more thermal mass to buffer temperature extremes. Facing south, or southwest, as many of the cliff dwellings do, would allow the sun to enter the openings into the interior and also warm the stones, which would give off heat at night. During the summer, when the sun is high in the sky, much less sun would reach the buildings and they would remain cooler.

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Blogger Cynthia said...

We would like to use a photo from the April 18, 2006 blog on a non-profit educational website in an article on Energy Efficient building. Can you kindly advise me how to obtain permission?

Thank you.

Cindy Joyce, SEED photo researcher

11:41 AM  

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