Start by making an outline on the siding where you want to position the ledger board.
Flashing deck to siding.
Item 3807 model 5504900120.
Amerimax 14 in x 30 ft vinyl roll flashing.
Install z flashing behind the bottom of the ledger and over the siding below.
Tearing into siding is all but inevitable if you build.
For pricing and availability.
A simple metal or plastic cap flashing is probably adequate to flash a deck ledger in a dry climate while the 3 layer system described in this video is suitable for high rainfall and damp climates.
This keeps water from wicking along the bottom of the ledger and getting behind the siding.
My instinct is to replace the deck and eliminate the ledger altogether add posts near the wall and leave a big gap between the end board and new flashing tucked under the siding.
Flashing consists of metal which is durable enough to be exposed to sunlight and mechanical wear and tear plus peel and stick membrane like vycor grace construction products.
Pry the siding out near a nail then push the pry bar against the nail as you partially tap the siding back in.
You may need to pry out siding first.
I would remove the old siding that was behind the existing ledger to about an inch above the deck surface.
This flashing needs to extend up at least 2 or 3 inches up under the siding above the deck.
Union corrugating 14 in x 30 ft vinyl roll flashing.
Then slip flashing behind the siding covering the top edge of the ledger.
If nails are in the way pull them out.
Make the outline large enough to include space for the deck boards on top the ledger and any trim boards on the sides.
Window and door cap 1 25 in x 120 in x 1 56 in aluminum z flashing.
The irc doesn t provide prescriptive measures for flashing other than the minimum thickness for metal flashing 0 019 in.
That should pop the nail head out far enough so you can pry it out.
To prevent water from seeping behind the deck s ledger board and rotting the board and the siding the flashing must cover the top of the ledger board and bend over the edge.