Just a few notes on the images above, and first things first . . . a shout to the zen master, an artist in aluminum, Tom Struble of Tom Struble Siding Company. While Stephen R Christopher called out the term "Brick Bend" for me, it was Tom who suggested that I add a little, as he called it, "kick" to the edge of the aluminum's face. Back-caulked, the idea is that it gives a more positive seal and a cleaner line at brick. It took me to my second one to realize that I had to bend it a little short of 90 degrees however. The goal with this of course is to have the aluminum spring out and hold tight against the brick. While Tom suggested that I would need no additional caulking, idk... my skill wasn't quite there yet, that or it was just the irregularity of 90 year-old brick, I did end up clear caulking the front edge of my brick bend. [...]