nealtw
Contractor retired
I think I would wrap the whole ledger board with a big Z flashing or a Z flashing and then tin with a drip edge tucked behind the Z and hanging down a little below the bottom of the ledger, and then bolt my joist hangers thru the flashing. Then start the siding again below the ledger.
Any water behind the siding would run down the tar paper or house wrap and take the Z out and around the siding below.
Just an idea.
I dont like the idea of bolting thru the siding.
I think he thinking of moving the siding first.