Straw-bale construction
From Wikipedia, the free encyclopedia
Straw-bale construction is a building method that uses straw bales as structural elements, insulation, or both. It is commonly used in natural building. It has advantages over some conventional building system because of its cost and easy availability[1], and its high insulation value[2].
Although grasses and straw have been in use in a range of ways in building since pre-history around the world, their incorporation in machine-manufactured modular bales seems to date back to the early 20th century in the midwestern United States, particularly the sand-hills of Nebraska, where grass was plentiful and other building materials (even quality sods) were not.
Contents |
[edit] Methodology
Straw bale building typically consists of stacking a series of rows of bales (often in running-bond) on a raised footing or foundation, with a moisture barrier between. Bale walls are often tied together with pins of bamboo, rebar, or wood (internal to the bales or on their faces), or with surface wire meshes, and then stuccoed or plastered, either with cementaceous mixes, lime-based formulations or earth/clay renders. Bale buildings can either have a structural frame of other materials, with bales between (simply serving as insulation and stucco substrate), referred to as "infill",or the bales may actually provide the support for openings and roof, referred to as "load-bearing" or "Nebraska-style", or a combination of framing and load-bearing may be employed, referred to a "hybrid" straw bale.
Typically, bales created on farms with mobile machinery have been used ("field-bales"), but recently higher-density "recompressed" bales (or "straw-blocks") are increasing the loads that may be supported; where field bales might support around 600 pounds per linear foot of wall, the high density bales bear up to 4,000 lb./lin.ft. and more. And the basic bale-building method is now increasingly being extended to bound modules of other often-recycled materials, including tire-bales, as well as those of cardboard, paper, plastics and used carpeting, and to bag-contained "bales" of wood-chips, rice-hulls, etc.
[edit] List of Straw-bale construction builders and resources
- Australia
- Canada
- Sustainable Works - BC, Alberta and US Pacific Northwest
- Harvest Homes - South-Central Ontario
- Camel's Back Consruction - Ontario
- United Kingdom
- Amazon Nails - includes long pdf document about straw bale building in UK.
- United States
- Arm of the Spiral was created to promote the fusion of sustainable and natural building methods and provide encouragement to the would-be owner/builder.
- Blue Rock Station - workshops and demonstration projects, books and information on alternative construction techniques
[edit] See also
- Books
- Straw Bale House, The. Steen, Steen, Bainbridge and Eisenberg. White River Junction, Vermont: Chelsea Green Publishing Group, 1994.
[edit] External links
- Kibbutz Lotan Center for Creative Ecology: Straw Bale Construction - Kibbutz Lotan, Arava Valley Israel
- BlueRockStation.com: Straw Bale Construction - Eastern USA
- Natural Homes:
- NaturalHomes.org: Current list of straw bale courses from around the world
- Straw Bale Buildings on Global Map Location of notable strawbale buildings. Contributions to house@naturalhomes.org
- PasoStrawBale:
- BuildingGreenTV.com: Green Building TV Video - Breaking down the myth's of strawbale insulation.
- California Straw Building Association
- DOE Building Technologies Program: House of Straw - Straw Bale Construction Comes of Age title
- GreenBuilder.com: International Straw Bale Registry Project - United States by state
- GreenHomeBuilding.com: Strawbale
- NaturalBuildingNetwork.org: Find natural builders, teachers and resources.
- SolarEnergy.org: Straw Bale Workshops
- TreeHugger.com: A Picture is Worth...: Construction of a Straw Bale House, Part 1 - Construction photos
- YouTube.com: Video of plaster work on a Straw Bale house in Fairview, Utah
- The Next American City: "Grass House"
 |
|
|||
