Thanks, Dan.
Regarding the ledger board let’s say a wood deck attached to the band joist of a house with vinyl siding. I’ve seen several details where the back/bottom flashing is present and also where only the top flashing is present, as well as others where flashing tape is utilized.
Here are some details to express my confusion:
Peel and stick membrane
Two Z-Bar flashings, at top and bottom
Back flashing and Z-bar on top
Flashing Tape
Regarding windows I’m referring to exteriors with vinyl siding. I’ve read that with the J-Channel installed the drip cap isn’t necessary because the fin is taped to the WRB with window flashing tape, and elsewhere that a drip cap should always be used even on top of the J trim.
To me these conditions are very similar and two of the only ones that, while very simple, I can’t get to the bottom of definitively.