[Image above] Rendering of the bioceramic dome homes that Geoship plans to start consumer production of in 2024–2025. Credit: Geoship, YouTube
By Laurel Sheppard
With wildfires raging in the West and major flooding in the South, the increasing frequency and severity of natural disasters are reaching record proportions. About one in 10 homes were impacted by natural disasters in 2021, according to global property data company CoreLogic. That is more than 14.5 million homes, totaling nearly $57 billion in property damage.
To withstand these increasingly extreme environments, architects will need to reconsider how buildings are constructed, from both a materials and structural viewpoint. Enter Geoship, a California-based startup that claims its bioceramic dome homes are not only disaster resilient but could help combat the affordable housing crisis.
Geoship is the brainchild of Morgan Bierschenk, previously a program manager and engineer at Intel. In an episode of the podcast TechFirst with John Koetsier, Bierschenk says the idea for Geoship first manifested in the early 2000s when he was backpacking around Asia.
“That experience led to the next 10 years of really looking into … how can we create environments including the physical environments around us, as well as the way we think about the world and our relationships to our friends and community, to kind of open up the possibility for those deeper experiences of just being alive,” he says in the episode.
Following that adventure, Bierschenk lived on a wooden sailboat for about five years and then did some work in Iceland on freedom of information projects. When he returned to the United States, he and his brother started thinking about new ways to build, which led to the founding of Geoship in 2015.
The material that Bierschenk decided on for the Geoship dome homes is a chemically bonded ceramic that is similar in composition to a phosphate cement developed at Argonne National Laboratories for storing nuclear waste.
Properties of the Geoship ceramic include
- Water activated like cement, so fabrication is at room temperature.
- Forms strong molecular bonds with itself and all types of aggregates.
- Highly insulating, reflecting about 80% of radiant heat.
- Minimal expansion or contraction once set, so not prone to cracking.
- Easy to repair any damage using the same material.
- 100% nontoxic (contains no wood, metal, concrete, or petrochemicals).
- Permeability similar to porcelain tile, absorbing little moisture.
- Can be produced from waste materials like sewage.
Based on these resilient properties, Bierschenk estimates the Geoship dome homes would have an expected lifespan of 500 years with negligible impact on the environment.
Bierschenk launched a crowdfunding campaign to raise funds to build the Geoship dome homes. Now, after raising more than $1.5 million and taking over 500 preorders, Geoship has built an 18-foot-diameter prototype made almost entirely from the bioceramic.
Each module of the dome is comprised of molded triangles, which are pieced together to form the geodesic shape. These triangular parts are about the size and weight of conventional concrete blocks.
Each strut is connected to five- and six-sided hubs with a single bolt. The exterior panels, each light enough for a single person to carry, are mortared to the frame of struts and hubs with the bioceramic mortar.
Windows are preinstalled in bioceramic window frames, which are attached to the dome frame with mortar. Interior panels attach at the three corners of the triangular panel with a “hub cap” that screws into the hubs of the frame. The domes are sealed with the bioceramic, which is waterproof.
The frame creates a 12-inch cavity between interior and exterior panels, which is filled with wool insulation. Mechanical, electrical, and plumbing all run through this cavity. The prototype foundation is made of ceramic blocks as a stem wall. Other conventional foundations are possible, including slabs and helical piers.
Potential advantages of these bioceramic dome homes include
- Lower heat loss because surface area is 30–50% less than a rectangular structure.
- Reduction in lifetime carbon emissions by 90% or more compared to homes constructed from traditional materials.
- Elimination of waste because panels can be recycled into new panels or reused as fertilizer.
- Quick and easy installation that a homeowner can do (frame assembles in a few days).
- Resilient in cold climates (withstands 40 feet of snow load).
- Maintenance costs a fraction of wood houses ($5,040 versus $305,033 per 100 years).
- Passive air conditioning, thus lowering energy costs.
- Easily expanded living area by connecting variously sized domes together.
Ultimately, Bierschenk believes the dome homes would be produced via locally distributed, heavily automated microfactories that would flat pack and ship the components, replacement parts, and repair materials to nearby homesites. The premade parts, which can only fit together one way, could be installed by either the homeowner or Geoship-certified installers. Homeowners would be able to customize the parts—from panel colors and configurations to number of windows and alignment—when placing their order.
Currently, the homes are not affordable for those with limited income. In a Forbes article, Bierschenk says base price for the ceramic components are about $106/square foot. However, once production scales up, Bierschenk predicts the price may drop to a third of its current cost, to just over $35/square foot.
Accounting for everything else that goes into building a house (e.g., permits and fees, insulation, floors, glass, delivery), Bierschenk estimates the all-in, fully complete cost will be $127/square foot, which compares very well to the range of $100–500 per square foot typical in the United States.
Consumer production is estimated to begin in 2024–2025. Geoship domes will be available in two sizes: the smaller 18-foot diameter dome (360-square-feet with loft) and a larger 30-foot diameter dome (1,040-square-feet with loft). For the latest information on Geoship, follow their Facebook page.