Building Dome Homes using the concrete panel building system is very common. This includes the interior, for example a concrete panel dome fireplace. Here are images of a guesthouse and the main Dome home, both had dome fireplaces built. This view is of the guest home, the fire place and chimney can easily be viewed, the bottoms of this chimney and fireplace were about 8 ft. in length and approximately 4 1/2 ft. wide at the base.
The p.v.c. pipe was used through out the project to create radius openings, and a plaster finishing scratch coat of Portland cement at the face of chimney.
A small concrete panel wall was built inside of chimney to reflect heat back into main room of guesthouse.
The photo here is of two different fireplaces, one in the guesthouse and the other in the main house.
Tiles were installed and the floors were acid stained. American Clay plaster products were applied to Portland cement surfaces.
This project demonstrates that although the radius is tight at the top of the cone chimney, the bottoms are large and egg shaped so a worker can climb up into the inside, this photo in the main area in between the living room, and the kitchen main entry.