Flashing ledger against concrete building

[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. 

[Bill Kibbel]

I've put spacers (washers) on the anchor bolts to allow water to drain between the ledger and concrete.

[Jim Katen]

Or use reglet flashing, like you would on a roof. 

[John Kogel]

You should just buy a concrete or tile cutting blade and cut a groove in the concrete with your Skil saw for that head flashing.

Edited May 30, 2017 by John Kogel
I said diamond-edged but maybe not diamonds

[Jerry Simon]

4 hours ago, John Kogel said:

You should just buy a concrete or tile cutting blade and cut a groove in the concrete with your Skil saw for that head flashing.

And as Sir James alluded to, the groove is the *reglet*.

[Jim Katen]

1 hour ago, Jerry Simon said:

And as Sir James alluded to, the groove is the *reglet*.

Exactly. 

It also works well when flashing stuff onto log buildings.