The Poetry of Architecture

Machine Translation: English
  • Name: The California Institute of Earth Art and Architecture
  • Country / Territory: Iran (Islamic Republic of), United States of America
  • IP right(s): Copyright and Related Rights, Patents, Trademarks
  • Date of publication: May 30, 2011
  • Last update: August 25, 2021

Cal-Earth, USA

The Cal-Earth trademark (Image: OHIM)

Nader Khalili (1936-2008) was an architect, teacher and inventor of the SuperAdobe construction method. Mr. Khalili’s innovative method was inspired by Rumi – the 13th century mystic poet – and the ancient Middle Eastern architecture he encountered on a five-year motorcycle ride across his homeland in the Islamic Republic of Iran (Iran). Combining Rumi’s philosophy on nature with ancient building methods and modern technology and know-how, Mr. Khalili developed his novel ideas into construction techniques.

Because his invention is easy to use, ecologically friendly and inexpensive, the new buildings are preserving the environment and radically improving the quality of life of countless people around the world.


Based on ancient but simple human shelters, the SuperAdobe – also called the super block system – uses layers of sand-filled bags that are coiled and placed one upon the other. The bags are securely attached into a dome-shaped structure using barbed wire. For extra stability, the buildings or adobe (a structure made of sun-dried clay or soil bricks) is held together using cement, lime, or asphalt emulsion. The adobe structure is simple in appearance but strong and resistant to floods, fires, hurricanes and earthquakes. It provides insulation against both heat and cold, and can be quickly constructed by men, women and young adults.

Research and development

In order to convert his idea into a viable project, Mr. Khalili approached the National Aeronautic and Space Agency (NASA) in the United States of America (USA) for research and development (R&D) support. NASA was a willing partner because it was interested in developing simple yet secure habitats on the moon and on Mars.

Foundations of a SuperAdobe structure
(Photo: Cal-Earth)

In 1984, Mr. Khalili presented his ideas to a NASA symposium (“Lunar Bases and Space Activities of the 21st Century”). The architect’s presentation was titled “Magma Structures,” and based on the Geltaftab System (a system whereby the entire earthen structure is treated as a kiln and fired to form a monolithic mass) and “Velcro-Adobe” (which later became SuperAdobe).

Mr. Khalili collaborated in further R&D at various institutions including the Los Alamos National Laboratory, in New Mexico, USA, and with the Space Studies Institute at Princeton University.  Working with McDonnell Douglas Space Systems labs, the architect explored ways in which the sun could be harnessed to melt and fuse luna soil into shapes and forms with building applications.

In 1986, Mr. Khalili continued his R&D by founding the Geltaftan Foundation (“Gel”, means “clay”, and “taftan”, means “firing, baking, and weaving clay” in the Persian language) whose aims are to create earth-based ceramic houses.  By 1991, the entrepreneur incorporated the foundation into a new non-profit and charitable organization – The California Institute of Earth Art and Architecture (Cal-Earth) – where he taught SuperAdobe building technology based on Rumi’s philosophy (such as “Yekta-i-Arkan” – unity of elements).

Cal-Earth is guided by three principles: (1) shelter is a basic human right; (2) every human being should be able to build a house for him or herself; and, (3) the best way to provide shelter for increasing human populations is by building with earth. Although Mr. Khalili’s focus at the foundation was on fired, ceramic buildings, at Cal-Earth the focus shifted to sand-bag based buildings that would culminate in the development of SuperAdobe.

Prototypes of SuperAdobe were built and have been tested successfully for the city of Hesperia, the state of California, USA, and passed industry building standards – the Uniform Building Code – for California (a region renowned for earthquakes).

A typical SuperAdobe building has an 8 to 10 foot interior diameter dome with about 120 square feet or less in floor area. The technology is resistant to earthquakes, fire, flood, and hurricanes. It has a thermal mass (where heat is absorbed in hot environments or given off in cold ones) which creates comfortable living spaces based on the long-standing, sustainable architectural methods of harsh climatic environments such as in Iran.

Because SuperAdobe technology is easy to build, secure and both cool and warm, the buildings are used in developing countries and for emergency shelter, especially for people displaced by conflict or natural disasters.

Environment and public health

Cal-Earth members work under the philosophy that ecologically sustainable, economically viable, and durable buildings are not just possible but are also desirable. Using Rumi’s poetry as an ethical guide, the organization relies on basic natural resources (earth, water, air and fire) and simple building principles (arches, vaults and domes) to create SuperAdobe structures. Cal-Earth believes that its shelters and homes should be easy to construct so that any man, woman and child, given basic instruction, should be able to build a shelter virtually anywhere on earth – and on other planets.

A typical SuperAdobe structure
(Photo: Cal-Earth)

To this end, the organization provides educational materials (DVDs and books) in environmental arts and architecture and instructs learners via building workshops and seminars in the USA and abroad. A typical workshop shows participants how to construct with building materials that are light yet flexible and can be created on site. The sand-bags, for instance, can be filled using small pots such as coffee cans or other kitchen utensils. SuperAdobe structures use traditional arches, domes, and vaults, earth or sandbags and barbed wire (four-point, two strands, galvanized wire which is recyclable) intertwined by single and double curvature compression shell structures, in order to reach the ultimate in strength. Alternatively, modern building techniques such as base-isolation (where the foundation is separated from the super structure) or aerodynamics are used to cope with environmental challenges such as earthquakes or strong hurricanes. SuperAdobe structures therefore apply tree-free approaches to construction. Instead of felling trees to build houses, adobe buildings use mud and soil instead. The same method can build silos, clinics, schools, landscaping elements, or infrastructure like dams, cisterns, roads, bridges, and can be used for stabilizing shorelines and watercourses.

SuperAdobes, moreover, are a valuable addition to efforts intended to reduce the risk to public health caused by poor housing in disaster prone areas. Indeed, in 2011 the United Nations International Strategy for Disaster Reduction (UNISDR) report – the Global Risk Assessment Report on Disaster Risk Reduction (GAR) – highlighted the risk faced by nations across the world due to catastrophic events such as cyclones and earthquakes. Having identified countries with a low gross domestic product (or GDP, the market value of all goods and services produced in a country) as being most at risk from such disasters, the GAR made several risk reduction recommendations with reference to the most vulnerable countries including the Republic of Haiti, the Islamic Republic of Pakistan and the Socialist Republic of Viet Nam. A key recommendation for disaster reduction management (DRM) was for governments to “improve building and land use decisions, compared with reinforcement of unsafe buildings, relocation of exposed settlements to less hazardous locations, or construction of hazard mitigating measure.” Because SuperAdobe structures have been successfully tested against natural disasters, are easy to construct, and are cost-effective, Cal-Earth believes that this technology has the potential to greatly reduce risk – due to natural disasters – and thereby safeguard the health of millions of people across the world who are living in low grade accommodation.

Furthermore, Cal-Earth seeks to minimize the environmental impact of the materials used to construct its homes. The organization uses both bio-degradable bags and low Ultra-Violet (UV) bags that do not omit toxic chemicals (unlike natural woven jute bags) to construct its homes. While permanent SuperAdobe buildings are reinforced with plaster to prevent erosion, temporary structures are designed so that they can erode and – in time – return to the earth.

Patents, trademarks and copyrights

Recognizing the potential for his invention to help poor and vulnerable people around the world, Mr. Khalili sought to protect it against commercial exploitation for purposes that may deny access to those who need it most. “The mission of my life for the last 25 years has been to provide shelter for people who cannot afford it. But you need to protect this, because many systems of building have been started for the poor, but along the way they become too commercial (for) them”, he said.

An example of Earth One Home SuperAdobe from
the interior (Photo: Cal-Earth)

Because Mr. Khalili wanted his invention offered freely to the poor but available to be commercially licensed, in 1998 the inventor filed for a patent at the United States Patent and Trademark Office (USPTO).

Seeking to propagate SuperAdobe across the world without leaving it vulnerable to usurpers, Mr. Khalili also filed an international patent application in 1999 using the international patent filing system established by the Patent Cooperation Treaty (PCT).

In order to expand into new markets and to commercialize its products without exposing its brand name to usurpers, in 2004 the organization filed a trademark for Cal-Earth™ at the USPTO and at the Office for Harmonization in the Internal Market (OHIM), in 2010. Cal-Earth, moreover, retains all copyrights for its building designs and drawings. Having established a comprehensive intellectual property (IP) strategy, Cal-Earth has been able to explore new commercialization and expansion opportunities around the world including the Hashermite Kingdom of Jordan (Jordan), the Commonwealth of Australia (Australia) and the United Mexican States (Mexico).

Branding and commercialization

Recognizing the commercial opportunities presented in a strong brand, Cal-Earth promotes several building brands and a range of clothing and accessories featuring its designs and philosophy. Apart from the basic structure of the SuperAdobe itself, Cal-Earth has created two new brands of adobe construction. 

Eco Dome or “moon cocoon” (and the Double Eco Dome) is a small home design consisting of a central dome surrounded by four smaller niches in a clover-leaf pattern. Eco Dome building packs are available to order online for do-it-yourself builders. Earth One Home, on the other hand, is based on a pattern of three offset vaults which allow a maximum view through the house's open-plan area.

Cal-Earth also merchandizes stylish t-shirts and hats with the organization’s logo displayed on it, and it sells books and DVDs written by or featuring Mr. Khalili.

Business results

Mr. Khalili’s vision of decent, affordable and inexpensive housing for all has captured the imagination of people around the world. In recognition of his contributions to technology and society the inventor and visionary has received several awards and citations including  the “Excellence in Technology” award from the California Council of the American Institute of Architects (CCAIA, 1984);  the UN and the USA’s Department for Housing and Urban Development (HUD) award for “Shelter for the Homeless” (1987); and  citations from NASA, the Aga Khan Development Network, and the American Society of Civil Engineers (for his work in lunar base building technology).

A row of SuperAdobes for community living
(Photo: Cal-Earth)

In 1993, moreover, following a refugee crisis flowing into Iran, Mr. Khalili worked with the UN and the Iranian government to instruct the refugees on how to build shelters based on SuperAdobe technology. Within a few days SuperAdobe based shelters costing as little as USD$625 sprung up. 

Eco Dome building packs and instructions, furthermore, retail at US $2,400 for a single unit (400 sq. ft. approx), and US $3,200 for double unit (800 sq. ft. approx.) and are available to buy on the Internet. Cal-Earth reached its 25th Anniversary in 2011 and the organization is carrying on its founder’s vision by giving monthly workshops on the SuperAdobe technology and construction methods around the world. As Mr. Khalili said, “SuperAdobe is an adobe that is stretched from history into the new century. It is like an umbilical cord connecting the traditional with the future adobe world.”

Poetry crystallized into structure

Using earth, air, fire and water, Mr. Khalili recognized that every jarful of earth could make a dwelling, shelter a community and sustain the environment. The architect patented his technology to ensure that it could be distributed and commercialized for the benefit of the poor, demonstrating that private financial reward is not the only reason why inventors may wish to protect their inventions with intellectual property rights (IPRs).