After preparing the drum, the next step was to prepare the "floor" of the drum, so I can lay the chamotte (fire clay) bricks.
The preparation for everything looked like this:
![](https://cdn.hackaday.io/images/8768271540712479599.jpg)
We needed to mix (local) clay, sand, wheat straw to get the properties we wanted: sticky, not shrinking too much and a bit insulating.
![](https://cdn.hackaday.io/images/455091545078582636.jpg)
![](https://cdn.hackaday.io/images/8141531540713031979.jpg)
We put a few bottles into the drum first, which serve as a good insulation. After all we want to conserve the heat in the drum!
After that we let it dry for a few days and then put in the fire clay bricks:
![](https://cdn.hackaday.io/images/7334411540713208825.jpg)
At this point I decided to cut the drum even more because we couldn't manage to create the dome without having access from all sides.
![](https://cdn.hackaday.io/images/9950851540713299710.jpg)
This is the final form of the drum and baking surface. Only the front and the bottom half of the drum are left.
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