In April this year, we broke ground on a small dome home in Indiana.
The shape of this home is an ellipsoid — 35 feet in diameter by 12 feet tall with a 2-foot integrated stem wall. What does that shape look like? Check it out on Monolithic Dome Institute’s ellipsoid dome calculator.
Construction of the house began with a concrete ring beam footing. The concrete slab for the floor was poured after the shell was complete. Usually, for a house this size, we pour an integrated slab foundation before attaching the Airform. We changed it up for this home to allow for the varying schedules of the customer’s subcontractors and inspectors.
Site access was limited, so we put our GHP 2000 concrete pump — which we brought for spraying shotcrete — to work to pump the concrete for the footing with a ready mix truck.
This dome features one large extended augment for the front door and four extended elevated augments for the windows. We had to do a little interior framing to ensure the front augments wall sections stayed straight. After that, the Airform inflated beautifully.
After installing the spray stops — door and window bucks, we sprayed the polyurethane foam. Our crews did a great job applying the foam clean and even.
Next, we hang steel reinforcing rebar to “stickers” embedded in the foam.
We used the GHP 2000 concrete pump to spray the shotcrete layers with a 2-inch nozzle for the first layer and a 1.5-inch nozzle for the final layers to achieve this finish texture.
Kathy and her family are currently busy working on the dome’s interior, and we’re excited to see it finished.
“Just a note to pat the men on the back for such a good job,” Kathy wrote in an email to Monolithc. “They are so nice, hard workers, and so courteous to work with even though many days have been rainy and very muddy here.”
“The dome looks great,” she added. “Excited to get busy on the inside. The men were so awesome to work with. Thank you for everything.”