A slope transition on a roof plane often requires a transition flashing, sometimes called an “apron.” The flashing is folded with a Z bend to compensate for the angle of the slate on the upper half (making a cant strip unnecessary), and is nailed along the top edge, then held down along the lower edge with cleats, as shown.
Dimensions vary, but 16”, 20 ounce copper stock is shown used above.
Photos by Joseph Jenkins
