Here is a description of how a small cob shed was made with all local, natural materials. The audio is compromised by wind, but you can still get a good feeling for how the structure was built. Nicely done I would say.
About 15 years ago I built the “Carriage House” using a prefabricated steel vault as a supporting structure for earthbags filled with scoria as insulation. It is a two story affair, with the lower one being a garage/shop and the upper one an office and storage space. I located a new 34′ X 16′ steel quonset building that was sold disassembled for $1900 delivered. I realized that if I raised it up 4 extra feet, I could build a loft in it, so that is what I did, using a double row of earthbags on either side to support it. There is potentially about 900 s.f. of usable floor area on two stories.
Each arched section is composed of five pieces, and there are 17 sections, so it entailed a lot of ladder work to bolt the thing together one piece at a time. Since the steel vault is completely covered with insulating earthbags, the building is very well insulated, and comfortable year-round. This concept could be converted to residential use, with the addition of kitchen and bathroom functions.
The end walls were created with wood framing and siding materials. Most of this wood was either recycled from nearby building projects (taken from the dumpster), or bought as remnants. The cedar lap siding actually represents four different styles, so the facade has a rather patchwork quality. The door and windows were all recycled as well. The bags were initially covered with papercrete that adds to the insulation value, but then later the entire vault was plastered with durable stucco.
The first floor houses the garage, shop, and some storage functions. There is a separate entry door, as well as the garage door. If the building is oriented with the glass end wall facing south, significant solar gain can be attained (in this case it might be advantageous to provide a solar shade over the window to shade it during the summer. The staircase to the second floor is rather narrow (about 2 feet) because it must fit between the two-foot intervals of the joist/ties. The interior of the shell could be finished in a variety of ways, or even left with the steel showing, as I did with this workshop and office. Cloth material could be draped over it, sheetrock could be scored on one side to allow it to curve to the shape of the vault, or wood tongue and grooved siding could be installed, to name a few possible surfaces.
The second floor has 6′ 7″ of head room in the center, and this diminishes toward the sides. The significant counter space utilizes areas where standing room is not available. The front office area has plenty of natural light from the southern windows, which can also be opened to provide ventilation through to the northern window.
The cross section shows the hybrid nature of this design. In order to gain height, the steel shell is erected on top of an earthbag stem wall, and then the earthbags continue on up over the building. The double columns of the stem wall provides thermal mass on the inside and insulation on the outside. An insulated concrete pad is poured for the shop/garage floor. The second floor joists and tie beams are essential elements of the design, since they resist deformation of the vault from all of the weight on it.
As I recall the entire cost of the Carriage House came in around $5000, with me doing most of the labor, and a lot of scrounging for materials. You can read more details about this at greenhomebuilding.com and the basic plan is available at dreamgreenhomes.com
I have been developing a bit of a forest garden in my urban back yard, so when Tomas Remiarz’s new book, Forest Gardening in Practice, was offered as a prize at permies.com I decided to see if I could win a copy. I am pleased to report that I actually did win a copy of this very informative book.
It features an in depth look at the history of the development of forest gardens, or food forests, and why they are becoming so popular around the world. The concept is only about three decades old, and seems to have taken root in Great Britain, where Robert Hart was an early adopter. His property is one of many around the world that are profiled as case histories in the book.
This approach to gardening draws heavily on permaculture principles, so the importance of understanding how ecosystems evolve with many layers of plants, soil, insects, humans and other animals is stressed. There is a step-by-step guide to how to create your own food forest. The book is heavily illustrated with color photographs and other imagery.
Forest Gardening in Practice is intended for private gardens as well as community endeavors. And then if you get the bug to go into business with your forest garden, there is much advice for doing that as well. All in all, I highly recommend this book for anyone interested in the concept of maximizing the potential edible output of your land in an ecologically benign way.
Cement has been called the foundation of modern civilization, the stuff of highways, bridges, sidewalks and buildings of all sizes. But its production comes with a huge carbon footprint. Environmental chemist David Stone was seeking a way to keep iron from rusting when he stumbled upon a possible substitute that requires significantly less energy. Special correspondent Kathleen McCleery reports.
The post An Environmentally Sound Alternative to Portland Cement appeared first on Natural Building Blog.
Owen Geiger is a prolific designer of simple and elegant housing solutions. Among his many designs are a number of multi-unit dwellings that could accommodate a range of multiple families or various living arrangements. I have recently compiled a page at www.dreamgreenhomes.com that shows six of Owen’s designs that are for sale. I’ll post pictures of these below to give you an idea of how interestingly varied they are.
Darrel sent in a note on the Rain Harvest Calculator that he has developed and made available free of charge on his website. Its a dandy.
Its a very good Rain Harvest tool that provides a lot of flexibility — you have control over all of the following:
- Location — specify your location and the calculator looks up the average monthly rainfall.
- Collection area
- Collection efficiency
- Water usage by month
- Water storage available
- Supplementary water available by month
- Specify years with less or more than average rainfall
- Tank design suitable for limited height crawlspaces.
- Nice tank frame design using half lap joints for the corners
- Used new old-stock commercial collectors at a very good price
- Efficient heat exchanger installation
- Using used and recycled materials kept the cost of the system down
|David with his three drainback collectors|
|David with heat storage tank in his 29 inch deep crawl space.|
|PEX coil heat exchanger with nice coil separation and support scheme.|
- The unique trickle down collector.
- A storage tank with a new liner design.
- An innovative version of a copper heat exchanger.
- A PV powered diaphragm pump.