First Timbrel/catalan Vaulted ceiling / roof.

After the success with Timbrel vaulted stairs I was itching for a roof.  We added a bath on the terrace and so roofed with .....
timbrel or cohesive tile, or catalan vaulted roof.

This is the bath on the terrace.

 We used hand made floor tiles for the first layer.  they are not so square and it would be better if they were longer than wide but they look great.

 Then another two layers of our rough "tiles" in cement.

amazing how much stronger it feels.

some pic showing top of first layer and beginning second layer