You should see the way the cheat on flashing here. There's one method called Philadelphia flashing - its a pretty sorry substitute - its just another caulking technique that fails. sigh.
Worst are the 'roofers' who rip off the lead flashing that was in the mortar joints... ugh.
Actually the fall project was to take the stucco off the 3rd floor back wall and repoint and reflash.
