Note where the magenta arrow points to. Do you see how the flashing is out and away from the wall and that the hemmed edge is BELOW the wood? Drops of water will form on the rounded metal edge and then drop to the ground. It's a brilliant detail that defeats the surface tension of water.
Note the hidden stiff brass edge strip
that keeps the copper looking great for decades.
You may think there's an error in the illustration. If you had the book in your hands or viewed a high-resolution version of the illustration, you'd see how the author called for the first row of wood shingles to sit about 1/4 inch ABOVE the flat, or sloped copper flashing.
You would never want the wood to sit on the flashing as it would
suck up water into or behind the wood (surface tension!). What's more, and it may be in the book, you'd want to pre-paint or stain the first row of shingles on all sides. Two or three coats would be preferable to prevent long-term rot.
I take off the week between Christmas and New Year's Day. That said, I will have a very special newsletter for you on New Year's Eve. It will explain much of what you will see below and exactly why I'm doing
it.
I'm really looking forward to dinner tonight after Mass. Not only will there be all sorts of wonderful treats made by Kathy, but I also prepare the Christmas Eve tradition of ice-cold shrimp cocktail. With each bite that I savor, I think of my dear Aunt Margaret
who introduced me to this delicacy!
Peace to you and your family.