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.
Deck siding acting as flashing.
Relying on sealed counter flashing isn t ideal but neither is marrying your cladding to your braced walls in one product.
You may need to pry out siding first.
That should pop the nail head out far enough so you can pry it out.
If nails are in the way pull them out.
Often the t 111 is acting as the braced wall panel.
Never put horizontal siding in direct contact with any horizontal material.
Make the outline large enough to include space for the deck boards on top the ledger and any trim boards on the sides.
In those cases often the flashing is placed to the t 111 and then counter flashed and sealed.
Start by making an outline on the siding where you want to position the ledger board.
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.
Slip the back flashing under the siding at least 3 at the top and the sides.
Cover the top edge of the vertical leg of the flashing with waterproof tar paper or house wrap.
This flashing needs to extend up at least 2 or 3 inches up under the siding above the deck.
Then slip flashing behind the siding covering the top edge of the ledger.
Learn how to inspect the proper installation of the deck ledger board flashing as a certified home inspector.
Cut it for flashing and you structurally damage the wall.
Installing z flashing 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.
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.
