Psyched to announce thier first offline event, TreeLife by The Cool Hunter, will be unveiled sometime in 2010 (city to be announced). Hey all you tree house builders and fanatics, your time has come for an inspirational modern prefab tree house playground made exclusively for forest loving, fresh air and sky dwelling mavens.

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Check out the prefab community blooming online these days! Tiny House Village is trying to connect communities of creative small dwellings. Ideas are abound for these eco communities with Resources For Life’s Small House Society.

Tiny House design has a great set of resources all linked here as well. Check out the plethora of architectural resources,

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“Our homes embrace the principles of eco-friendliness and cost-effectiveness, without sacrificing beauty. We can ensure that each dwelling achieves a gold or platinum LEED rating, depending on the particular finishes, building systems, and site design an owner chooses.” ~ Michelle Kaufmann Designs

Each Glidehouse home is solar ready with other renewable energy system options possible such as geothermal, wind generator or hybrid systems. Designed for clean, simple living. The Glidehouse is built in a factory, using the most modern and environmentally friendly building methods and materials.

Some eco features of the Glidehouse include:

• using healthy finishes such as non-toxic paints and formaldehyde-free cabinetry.
• it meets the Energy Star® program standards for energy efficient homes and meets the performance standards of the American Lung Association Health House program.
• it’s insulated with an air-barrier, open cell foam insulation, and all wood-to-wood framing joints are caulked, which makes the home airtight, energy efficient, and less likely to produce mold.
• it uses water-saving plumbing fixtures, on-demand water heaters, and a mechanical ventilation system that is 30% more efficient than typical forced-air systems.
• energy efficient, dual-pane glass windows and doors are placed throughout the home to maximize cross-ventilation and natural lighting, minimizing the need for artificial lighting and climate control.

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If you live in dangerous drought conditions, wildfires are a worry.

So imagine a campsite dwelling designed so that you can easily just close it up entirely, completely concealed inside a fireproof sheath, whenever you are away. It is perfect for sites like this isolated area of drought-ridden Australia.

When closed, this prefab is completely sheathed in copper. This protects the 10 x10 foot building from brush fire. And not just fire:

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This difference was also evident in houshold products - from luxury hotels in Italy fully outfitted with CFLs to low-flow water fixtures and dual-flush toilets in many homes to small upright washers in even the most basic apartments, the kinds of products associated with our burgeoning US green movement today were already the norm in many parts of Europe back then.

On a recent trip overseas I happened to pick up a French architecture magazine for the flight home. I was pleasantly surprised to see that we had really caught up in the past six years - outside of being written in French, you would have been hard-pressed to distinguish this magazine from any of the leading US architecture magazines.

One article caught my eye, though, for it did point out a slight difference that needs to move across the pond. It was on a beautiful and practical prefab home, called the EvolutiV house by Olgga Architectes of Paris. The house itself is striking, made from two rectangular prefrabicated sections that can be rearranged to develop different floorplans and having exterior walls made from sections of wooden logs. The homes also come with the latest and greatest in eco-design: natural ventilation, rainwater collection, solar panels (both PV and thermal), green roof, radiant heating with an option for geothermal heating/cooling, and the typical eco-friendly materials throughout.

The most interesting piece of the story, though, is that the literature for the house and the articles written about it all refer to the home’s target energy usage: less than 48 kWh / m2 / year, which translates to about 4.4 kWh / ft2 / year. This is 70% less energy usage than the typical US home in similar climates.

It’s not the level of performance that makes this interesting, for many prefab options in the US can do as well. It’s that the media in France AND the architecture firm who designed the house feel compelled to advertise efficiency in terms of a single number that is easy to understand and can be used to compare this home to others one might choose. I’ve rarely if ever seen that in discussion of US prefab options (or other green homes) - outside of a LEED rating, we’re often left to guess exactly how eco-friendly that home is. We’d love to see this become more widespread in the US - information is power, and simple, objective numbers like this can help us separate the truly eco-friendly from innovative designs that are green in name (or advertising) only.

To see more photos of the Evolutiv house, click here to view the balance of this posting. (FYI, the EvolutiV house is about 800 square feet and is available in France for about $150,000.)

And click here to find great green prefab homes available in the US.

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Which is why we decided to write about small green prefab rooms or homes - “weefabs” - so small that you actually might be able to put one in your backyard. They could serve as a “room-away-from-home” place for the inlaws, a quiet office or TV room out back, or simply a comforting, tranquil place to just hang out and relax. While not affordable compared to pre-made sheds at Home Depot, you can still secure most of these models without having to take out a new mortgage. Which is good, because at least right now most mortages harder to come by than a protest license in Beijing!

We’ve always liked Modern Shed - whether you live in a Mid-Century Modern home or a traditional Cape Cod style in New England, Modern Shed makes a model that will fit in with your design. They have many green features, and you can get several models for less than $10K. Shipping is included in the price, and they’re designed and shipped so that a relatively handy D-I-Y-er can do the install.

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Finally, the log jam seems to be breaking. Several firms have begun to produce green prefab homes for real people in small but growing numbers. This past month, Marmol Radziner, a prefab company here in Southern California, made a splash with some pretty showy installation videos on local media outlets. These homes are either a) high end or b) for the firm’s founders, so they’re still a ways away from mass-market. But, the videos do a good job of showing what elements make prefab homes unique (factory construction, rapid installation, modular components) and at least to me suggest that they’re not all that far away from being able to replicate these installations on a larger and thus less expensive scale.

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What do you do? Build more hotels? That’s one solution, but what about the rest of the year, when there is a lower, more typical demand, and you’re left with capacity far exceeding needs, and resources were used to build these hotels that could have been used elsewhere?

Abilmo, a French company, has a possible solution: They make foldable hotel rooms. Come again? Yes, they have been able to fabricate accommodations that can be set up, without a crane, as many as 25 erected in a day. And they’re not shabby, either.

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It seems everyone is “going modular” these days with the rapid growth in the movement of green prefab design and construction. The buzz in modular construction is causing a rush of new designs, innovative products, and advanced modular systems being introduced. The goal of prefab is still the same as minimizing waste while maximizing efficiency. To learn more about prefab design and what makes it a compelling form of green building, please click here.

No longer are the days when just calling yourself a prefab company is considered environmentally progressive. Homes are now being made from materials like reused shipping containers, recycled steel, and certified sustainably-harvested wood. The new challenge for prefab companies is balancing the economics of innovative sustainable design with the realities of construction and raw material costs.

We want to highlight some companies doing some very interesting work in the prefab space.

Envision Prefab shows their commitment to the environment by attempting to maintain a zero carbon footprint in both manufacturing and production of their models. Their e-House reuses shipping containers transformed into seamless interior spaces, while including a laundry list of green systems such as tankless water heaters, solar panels, and LED lighting.

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1. Asia — United Nations Climate Change Talks: “Kyoto II” climate talks open in Bangkok

“The first formal talks in the long process of drawing up a replacement for the Kyoto climate change pact opened in Thailand on Monday with appeals to a common human purpose to defeat global warming.

‘The world is waiting for a solution that is long-term and economically viable,’ U.N. Secretary-General Ban Ki Moon said in a video address to the 1,000 delegates from 190 nations gathered in Bangkok.

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]]> http://ecoworldly.com/2008/04/05/10-top-environmental-headlines-of-the-week-2/feed/ http://elizabethredmond.greenoptions.com/2007/07/27/eco-effective-options-prefabrication-and-modularity/ http://elizabethredmond.greenoptions.com/2007/07/27/eco-effective-options-prefabrication-and-modularity/#comments Fri, 27 Jul 2007 14:28:03 +0000 Elizabeth Redmond http://elizabethredmond.greenoptions.com/2007/07/27/eco-effective-options-prefabrication-and-modularity/ Prefabrication and Modularity are new eco buzzwords on the menu this year. From homes to furniture, designers are beginning to employ new methods of construction and transportation to cut waste and energy consumption, ensure safety, and achieve greater overall methods of sustainability. When we hear the term “modular prefabricated homes,” we probably think of a little trailer down by the river. This is hardly the case with the modern rise of Steve Glenn’s LivingHomes. When you think of modular furniture, it doesn’t seem very sturdy, huh? But in fact, many of us have all used it- you buy a put-it-together-yourself desk, bring it home in a flat box, and construct it in the intended room. Just think about how many more desks can be shipped in one truckload in their deconstructed, flat form. Lots more! This cuts shipping costs, emissions, total embodied energy…

Prefab homes are constructed in a similar way, just on a larger scale. LivingHomes is a new cutting edge modern ecolicious house in Santa Monica, CA. The first model is Platinum LEED certified by the USGBC. Exquisitely designed by two renowned architects (Ray Kappe and David Hertz), LivingHomes has a portfolio of designs that their customers can choose from. The premise of the prefab/modular home is quite similar to that of a Rubik’s cube. In other words, as long it maintains a similar shape and structure, the rooms within a design can be shuffled around. The home is first constructed in a factory, then carted off to the construction site and put together in modules. The modules were completed in less than 6 months. On site construction of the first LivingHomes took under 12 hours.

Why choose prefab? Here is the skinny on the prefab eco accomplishments. Since the modules are constructed in a factory, a higher quality construction can be ensured than on site stick-built homes. The fasteners are accurately applied, materials are cut with more exactness, and since they have to withstand transport, everything is tighter and more secure. This extends the lifespan and cuts the upkeep. Modular prefabrication also saves significant amounts on their waste. While 30-40% of the material from a standard home construction site is carted off to the dump, modular homes generate only about 2% waste. That is a pretty large gap. Additionally, since the duration of construction is shorter, the cost is lower!

In terms of furniture, the complete cycle of Ecosystems Furniture resembles a quite responsible cradle to cradle method. The deconstructed components are intended to be flat and standard; therefore, the design can be sent to a computer and cut in masses at regional locations, packed flat, and shipped to more local distribution areas. The pieces are then purchased and assembled on site.

New trends on the horizon: Constructing a home in a warm climate is different from home construction in the variant climate of Michigan. Some are figuring out how to prefabricate well-insulated, secure, efficient, sustainable, and beautiful homes, even in the northern states. Challenging conventional construction techniques, a young architecture group called HueProjects in the greater Detroit area just completed a beautiful prefab home for five in the a Detroit Suburb. As the trend grows, progressive universities and community colleges are developing programs in prefabrication. Up north, prefab allows builders to construct homes year round, even in the blustery months of January and February. This concept improves efficiency and ability, meanwhile achieving all of the modular prefabrication benefits.

]]> http://elizabethredmond.greenoptions.com/2007/07/27/eco-effective-options-prefabrication-and-modularity/feed/ http://greenbuildingelements.com/2007/04/16/the-greenness-of-prefabrication/ http://greenbuildingelements.com/2007/04/16/the-greenness-of-prefabrication/#comments Mon, 16 Apr 2007 12:54:30 +0000 Philip Proefrock http://greenbuildingelements.com/2007/04/16/the-greenness-of-prefabrication/ Photo Credit: Living Homes (via Inhabitat) Bob Ellenberg wrote a good, thought-provoking (and discussion-starting) article at Inhabitat titled 'Prefab Construction: Green or Greenwashing?' and drew comments from Preston Koerner (of Jetson Green) and Lloyd Alter (an architecture writer at Treehugger with whom I had some inter-blog discussion over the past couple of weeks regarding foundations, but more importantly also an entrepreneur in prefab construction with direct experience in the process).

Prefab is a popular concept in green design circles and shows up regularly on a number of blogs. A few of the more prominent examples include: Inhabitat (Pre-Fab Friday); Jetson Green; Treehugger; BldgBlog; MoCo Loco; and even a website devoted to prefabs: FabPrefab. But it's a valid question that is being asked. How "green" is prefab building, and should it be embraced by those who want a greener building? Bob sums his article up this way: "I want to honestly question what is and what isn't 'green' about prefabrication and encourage others to do the same."

Prefab construction can be very green. The LivingHomes prefab illustrating this article is a LEED Platinum building. But, there are very few examples of prefabs that have LEED certificaion. And not every prefab qualifies even as a LEED certified building, let alone a Platinum one.

I'll highlight the points from Bob's article that I want to address, but I recommend reading the whole article.

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Material waste/efficient use of materials - Because of the more modular and more engineered nature of prefabs, they often (but not necessarily) use modular dimensions that correspond to standard material sizes (such as using a 2' module to minimize waste from standard 4' wide sheet products like plywood and OSB). Some site-built projects use these approaches as well, but this depends on the designer and the builder, not the construction method.

Over engineering - I think this tag can be hung on site built projects as easily as it can on prefab. There are different ways that materials are used in each kind of construction. Bob's article points out some of the areas where prefabs need to have additional structure for transportation and erection purposes. Once the building is in place, this additional structure serves little useful purpose. On the other hand, for the site-built home, far too often, large, dimensional lumber pieces are used for headers for openings in non-loadbearing conditions where they are completely unnecessary, simply because it is common and traditional practice to do so.

Carbon footprint for transportation (and other uses) - Material delivery from distributed manufacturers to the prefab plant or to the supplier or retailer who then delivers it to the jobsite probably is slightly more efficient on the prefab side. If the prefab manufacture is fairly local to the final instalation site, it's probably beneficial to do the prefab. The greater the distance between prefabricator and final assembly site, the less benefit there is.

The benefits to having workers coming to a consistent work location (the fabrication plant) rather than driving all over the region (as many site-built tradespeople do) is probably a carbon benefit, as Lloyd points out in his comment. The factory, if it is in a cold weater climate, most likely has a heated space that requires additional power. But cold weather construction goes on for site-built homes as well, and 'salamanders' (large propane-fired space heaters) are used to heat these yet-to-be-insulated buildings under construction. I'm not sure ehich way this goes, but it's not as one-sided against prefabs as you might initially think.

A prefab also should benefit from being constructed in a shop environment where tolerances can be much finer. This allows for a building with tighter construction, which should pay benefits in reduced air infiltration, better insulation, more comfort and lower energy use. Exposure to the elements during construction can cause problems with the building later on. Fabricating the building in controlled conditions makes this much less of an issue.

Prefabs may also tend to benefit from a design that needs to take transport of the building into consideration. Though not an explicit requirement of prefabs, I think the general trend for prefabs is to be smaller than corresponding site-built structures. In many cases, the modernist aesthetic of prefabs also contributes to the building being smaller and more efficient. Fine finish is given precedence over raw square footage.

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The whole issue of "green-washing" is key. Lots of businesses are seeing their customers asking for green products, whether they are selling soap or shirts or cars or homes. So, whether something is truly green or not becomes an important question consumers are asking. And, with so many competing definitions, and so many tenuous attempts to claim greenness, the question is a valid one.

As with many things that are green, I don't have a clear cut and definitive answer to offer. Instead, I'll say "It depends." (I use this phrase a lot, but it's probably appropriate here as elsewhere.) Pre-fab is a process, not an end-product. Therefore, it can be done well or badly. It's certainly possible to be very efficient and do site built construction. It's also possible to do wasteful and inefficient prefab manufacture.

In and of itself, pre-fab is not automatically "green." When done well, it can be a method that leads to a better constructed home, including one that uses fewer materials and operates more efficiently (meaning less carbon footprint over the building's lifetime, a much larger chunk of its carbon footprint to consider than its construction). In green building, we try to take a look at the larger picture, rather than only focusing on the final building alone. Life cycle issues, and the methods and processes all contribute to making a building green. It's the execution of the concept, and not the idea itself, that makes or breaks a prefab as a greener building.

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