Pete99

With wooden deck ledger's attached to wood framing, the ledger always gets flashed, preventing water from entering behind the ledger and causing rot. For the first time, I've come across a ledger fastened to a wall that is concrete above and below, with no additional siding planned. What is the protocol for flashing in such a situation? I assume that it is still desirable to prevent water from getting behind in the letter and freezing and expanding, but there is nothing to lap over the flashing above it.