He's built a few houses. I know he made a kiln and made clay tiles for a roof. Can't remember if he made bricks or not. On one of them he had vertical sticks and then horizontally weaved smaller sticks through the vertical sticks, then took mud/clay and covered the whole thing.

Edit: Here is the video of that house build. The walls are layers of rock and clay.

https://youtu.be/P73REgj-3UE

He's built a few houses. I know he made a kiln and made clay tiles for a roof. Can't remember if he made bricks or not. On one of them he had vertical sticks and then horizontally weaved smaller sticks through the vertical sticks, then took mud/clay and covered the whole thing.