The original deck on my house was attached by having boards extending out from the basement joists through the brick casement (e.g. partially sistered with basement ceiling joists).
At some point over the years, that deck was replaced. They put a board up against the house and used lag bolts instead, cutting off the existing joists. Unfortunately they did not repair the brick wall behind it, leaving the edges of the untreated wood exposed. Predictably they've rotted and need to be replaced.
The deck has to be removed in order to make proper repairs to the wall. Unfortunately, I cannot remove and then reattach the deck - attaching decks this way is now apparently against code here in south western Pennsylvania.
I am hoping to get a few more years use out of this deck so I am thinking about install counter flashing above the board against the brick casement. I feel comfortable with grinding out the mortar in the right place, but I do not have the tools necessary to bend long sheets of metal.
TL;DR Is there a material that I could use for counter flashing which doesn't require the ability to bend large pieces of metal in to a Z pattern?