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 www.greenhomebuilding.com, 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.

August 17, 2006

Water Conservation

Many people feel that an adequate supply of clean water will be one of the most significant issues of the future, and I have no reason to doubt that. The United States has been blessed with an abundance of good water, and we have gotten used to having it at the twist of a faucet handle. It can be a shock when water supplies diminish and water has to be rationed, or if the supply gets contaminated and is no longer available for potable use.

Water agencies always advise conservation; they know how precious and limited the supply is. In fact, many plumbing codes now require that new installations of toilets be low consumption models and that showers be fitted with restriction diaphragms to limit the flow of water.

Other strategies for conserving domestic water tend to be rather controversial. The reuse of gray water, using rain water catchment systems and composting toilets all conserve water but may be frowned upon for various reasons, mostly to do with health concerns. In many places these practices are flat out illegal, even though they have been shown to be safe and effective when utilized carefully.

Recycling gray water (from the drains of baths, showers, washing machines and bathroom sinks) is very tempting because it seems so benign and obviously of value. Black water waste (from toilets, kitchen sinks, garbage disposals and dishwashers) is more clearly of dubious value because of all the organic material it contains and the potential for bacterial contamination. About 2/3 of all the water used inside a typical house could be diverted for the use of watering plants, flushing the toilet or washing clothes.

Here are some guidelines for gray water use: never use for direct consumption; don't use directly on anything that might be eaten; don't spray it; never reuse water from washing diapers or cleaning meat or poultry; occasionally water plants with fresh water as well to leach away any buildup of toxins, and use biodegradable soap.

Because of continuing draught, California legalized the use of gray water in 1992. However, it was only legalized for subsurface use, either with drip systems or mini-leach systems. Drip systems require the use of a surge tank to clarify the water, where leach systems may use the gray water directly. In either case the water must be introduced at least eight inches below the surface.

Rain water catchment is definitely gaining popularity throughout the U. S. , with an estimated 250,000 cisterns in use. There are many places where it is the only way to get decent water. Again, these systems are not without some health risks, so care is advised in setting them up. Rain water can be used directly without treatment for evaporative coolers, toilets, car washing, chlorinated swimming pools, and surface irrigation. For other household uses, it is advised that the rain water be disinfected.

Roofs made of metal, clay, tile, or slate are often used to catch the rain; other types of roofs might leach harmful components into the water. A clever way to capture the initial rainwater that might contain bird droppings, dust and debris, is to employ a standpipe where the first water fills the pipe, and then the overflow goes into a cistern. This standpipe is then drained after the rained has stopped. It is recommended that about ten gallons be diverted for every 1,000 square feet of roof area. The cistern or storage tank should be situated as close to the downspout and at as high a level as practical. Of course during seasons subject to freezing weather, the system must be protected from frost damage. Also a sealed tank will keep the water cleaner.

Sometimes water is captured from paved areas, and that is best used for watering plants. A considerable amount of water is typically used for watering landscaping, especially lawns. It takes about 660 gallons of water to put one inch of water on 1,000 square feet of lawn. When Rosana and I were living in a bus conversion motor home, we managed to accommodate all of our domestic water needs (including showering) on about 20 gallons a day, so that bit of lawn watering would have provided us with about a month's worth of water! If you must have a lawn, just water when it really needs it, or better yet, let it go brown during the dry season. Other strategies for diminishing outside water use include mulching plants, using drip irrigation or soaker hoses and planting indigenous, drought-resistant plants.

To read the rest of this article, please go to this page at www.greenhomebuilding.com

August 02, 2006

Strawbale Home Designs


I am very pleased to introduce you to Touson Saryon, the newest designer associated with www.dreamgreenhomes.com . Touson found a passion for architecture during his youth in a small country town outside of Boston, MA. Through education at both Syracuse University School of Architecture and University of Massachussets Dept. of Landscape Architecture, he was able to develop a balanced design approach of both interior and exterior spaces. Learning was extended in a private 2 year internship with an ecological architect in Northern Califorina where he gained extensive knowledge of sustainable design principles and materials. During 8 years living in Crestone, CO, Touson designed and built a passive solar family home and grew his design practice. A few homes have been recently featured in The New Strawbale Book and The Small Strawbale. Touson now resides in Mount Shasta, CA with his wife and 2 children and continues to design in both Colorado and California.

Over a dozen of his home designs have been posted that feature thick strawbale (or adobe) walls and passive solar heating, from simple cabins, such as Cozy Strawbale, to more elaborate designs, such as Bale Courtyard. These are all non-load bearing structures with strawbale infill, making them easy to permit and flexible to phase the building process. With such a structure, it is possible to mix and match a variety of infill options depending on the availablility of materials, aesthetics, and function of the wall; thus adobe, cob, rammed earth, earthbags, cordwood, stone and other materials, as well as strawbales, could reasonablly be employed.