I am also interested in the mounting procedure and the fasteners used. Is it possible to do it alone?
For slate, onduline and corrugated roof panels, there are special slate nails and the same self-tapping screws, they differ in large hats, self-tapping screws are often made under the key, ie, they are screwed with a special head.
Lay slate and decking on a wooden crate, if there are plans for additional insulation for the cold season, it will be necessary to lay another layer of vapor barrier of some special material.
Well, that's basically all the tricks, the only thing to remember is that the slate is quite fragile material, and therefore in his case it is better to use screws, not nails.