LOL, i let you guys figure out the english translation, but this is the term for this style of tiling. To get it somewhat right I am relying on a book for apprentice roofers.
From a sheet of Plasticcard i am cutting out the square slates (1 centimeter) and am rounding them on one corner. This is what my workbench looks then. (i am a kitchen refugee for the moment as the other room is to cold)
Tiling work starts according to the book (see above). Best thing is to start a few already, they are fixed well enough tomorrow to continue. Glueing is done with carpenters glue.