The solution to rotting sidewalls is a small piece of bent metal called a kickout flashing at roofing suppliers which simply directs all that water away from the wall.
Deck siding flashing.
Painted galvanized steel features a baked on factory finish.
Slip the back flashing under the siding at least 3 at the top and the sides.
Keep in mind the bottom of the upper siding should be at least two inches above the flashing or the decking that s near the house.
Deck flashing diverts water runoff from the side of the building away from the ledger board which is the joist that s attached to the side of your house.
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 is both greener and cheaper and it usually looks better to reuse old siding than to patch in new and try to match the existing finish.
Use asphalt paper between metal and pressure treated lumber.
Pry the siding out near a nail then push the pry bar against the nail as you partially tap the siding back in.
If nails are in the way pull them out.
Though it will take some dismantling and perhaps a replacement deck board or stick of siding following the recommended practices for installed ledger flashing based on your exterior cladding is the best approach.
Fits over leger board and behind siding to protect from water damage.
Make the ledger out of pressure treated lumber that is 2 inches wider than the joists.
I advocate removing siding carefully so it can be reused.
The horizontal leg should be wide enough to extend all the way.
Install the kickout flashing.
This flashing needs to extend up at least 2 or 3 inches up under the siding above the deck.
The flashing can then lap the top of a lower course of siding or the foundation so any water that does get into the joint will be directed outward.
The level of water resistance you need to achieve when flashing a deck ledger will depend on the rainfall and how dry your climate generally is.
Galvanized deck ledger flashing fits over deck ledger board and behind siding for protection from water damage.
Install z flashing along the top edge of the ledger.
That should pop the nail head out far enough so you can pry it out.
For example if the deck has.
You may need to pry out siding first.
The amerimax 8 ft.
Never put horizontal siding in direct contact with any horizontal material.
How to use flashing between vinyl siding and a wood deck 1.
The flashing made of vinyl or galvanized.
