Abobe cob construction will feature prominently along with alot of old timber my place is named bedrock after the flintstones.
Putting a roof on a cob house.
From sod to straw wool to wood there are a variety of roof insulation options for cob houses.
The main approach here is to have a solid timber act as the header for the span of the top of the window or door.
You can absolutely have windows and doors in a cob house.
Windows and doors in a cob house.
Cob structures can be used as homes chicken coops barns and even smaller ones for ovens.
Many cob homes are made with curves bumps and flowing lines.
Learn about the pros and cons of each material in this excerpt taken from roofs.
The roof can be constructed the same way and many are made with a flowing.
You would place a bond beam at the top of the cob wall ideally concrete and rebar or alternatively airplane cable connecting all the members of the roof in one big circle they way the roof is designed is to act in compression while exerting force on the bond beam which will act in tension.
For a first time builder a yurt style roof like cyric30 suggested would probably be easiest.
Basically have a big beefy piece of wood at least 6 inches thick and go for as wide as the wall.