How to use flashing between vinyl siding and a wood deck 1.
Deck siding flashing.
Required materials for this project aluminum nails bolts drip flashing j channel ledger board silicone caulk undersill trim z flashing.
Install z flashing along the top edge of the ledger.
If you re just trying to buy a few years until a new deck can be built some tubes of high quality silicone caulk and whatever other tricks it takes to divert water to the face of the ledger can buy you some time.
This flashing needs to extend up at least 2 or 3 inches up under the siding above the deck.
Use asphalt paper between metal and pressure treated lumber.
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.
You may need to pry out siding first.
The horizontal leg should be wide enough to extend all the way.
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.
I advocate removing siding carefully so it can be reused.
Slip the back flashing under the siding at least 3 at the top and the sides.
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.
Make the ledger out of pressure treated lumber that is 2 inches wider than the joists.
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.
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.
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.
For example if the deck has.
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.
Install the kickout flashing.
Painted galvanized steel features a baked on factory finish.
Pry the siding out near a nail then push the pry bar against the nail as you partially tap the siding back in.
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.
Kickout flashing installs just like standard step flashing except that half of the kickout flashing hangs over the edge of the roof.
Galvanized deck ledger flashing fits over deck ledger board and behind siding for protection from water damage.
If nails are in the way pull them out.
The flashing made of vinyl or galvanized.
Fits over leger board and behind siding to protect from water damage.
