01
Set a straight durable edge
The substrate and trim must support the intended slate projection. Excessive overhang leaves corners vulnerable; too little can expose wood or direct water onto the wall.
02
Coordinate the starter and verge
The under-eave course, first field course and gable edge meet at the lower corner. Plan that junction so laps remain complete and the edge does not begin with a weak cut.
03
Protect against wind uplift
Perimeter zones often experience higher design pressures. Fastening and edge details should follow the project’s wind requirements and accepted slate practice.