Dr. Sunny Cai’s Earthbag Domes and New Website


“Dr. Sunny Cai (Liang-Juei Cai), Ph.D (in Ecological and Chinese Ancient Architecture), now retired from University and living in Taiwan, is an author and professor specializing in the field of ancient and ecological architectural planning and design. Dr. Sunny not only attempts to build houses with high standards, incorporate carbon reduction but also rummages raw materials, which is recorded in China’s ancient architectural books, to solve environmental pollution issues. Dr. Sunny, as a volunteer, tries to help people who are eager to build a comfortable and green house.

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My Earthbag Project in Honduras

“Greetings! I am reaching out to say hello as a fellow earth builder! I have looked through the Earthbag Building.com site and even downloaded your PDF book a few years back. Excellent resources! I also wanted so share my project. I am from Connecticut and was working in Honduras as an English teacher from 2012-2014. … Read more

Air-crete Building


“What is Air-crete? Air-crete is a lightweight cementitious material that contains stable air cells uniformly distributed throughout the mixture. It is a concrete which utilizes a stable air cell rather than traditional aggregate. It is also called cellular concrete, foam concrete, light weight concrete, aerated concrete etc. Typical concrete has a density of 140 lb/cu.ft. Air-crete densities range down to 20 lb./cu. ft.

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Don’t Build Domes in Wet Climates Without Roofs

Close-up view of water damaged plaster
Close-up view of water damaged plaster

“This is the dome of a friend in Colombia, is located at 1,600 meters above sea level on a rainy climate, in a land with many gravel. The superadobe is stabilized with hydraulic lime, has a double wall to 3.30 and wire. Foundation is 60 centimeters deep and filled with cement and stone above it a concrete plate 6 cm. The iladas of superadobe may have moisturized longer than necessary due to rain during the construction process despite being covered with plastic dome.

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