Deck Against Siding Flashing

Slip the back flashing under the siding at least 3 at the top and the sides.

Deck against siding flashing.

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. The horizontal leg should be wide enough to extend all the way. 23 roof to wall and deck to wall flashing home builder s guide to coastal construction page 3 of 3 figure 3 deck ledger flashing. For example if the deck has.

Technical fact sheet no. Pry the siding out near a nail then push the pry bar against the nail as you partially tap the siding back in. Snap a chalk line cut out the siding and tack up the ledger board. You may need to pry out siding first.

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. That should pop the nail head out far enough so you can pry it out. Install z flashing along the top edge of the ledger. Materials required acrylic caulk drip cap galvanized flashing galvanized joist hangers galvanized lag screws galvanized nails and screws pressure treated wood z flashing.

If nails are in the way pull them out. Never put horizontal siding in direct contact with any horizontal material. Start by making an outline on the siding where you want to position the ledger board. This flashing needs to extend up at least 2 or 3 inches up under the siding above the deck.

Make the ledger out of pressure treated lumber that is 2 inches wider than the joists. Then slip flashing behind the siding covering the top edge of the ledger. Remove the existing interior and exterior sliding door trim remove the existing sliding glass door remove any deck boards restricting the installation of proper deck flashing install a copper door pan and copper deck flashing copper seams will be soldiered re install the existing sliding. Make the outline large enough to include space for the deck boards on top the ledger and any trim boards on 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.