Flashing Deck To Siding

This keeps water from wicking along the bottom of the ledger and getting behind the siding.

Flashing deck to siding.

Start by making an outline on the siding where you want to position the ledger board. Tearing into siding is all but inevitable if you build. Pry the siding out near a nail then push the pry bar against the nail as you partially tap the siding back in. 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.

Item 3807 model 5504900120. For pricing and availability. The irc doesn t provide prescriptive measures for flashing other than the minimum thickness for metal flashing 0 019 in. Amerimax 14 in x 30 ft vinyl roll flashing.

I would remove the old siding that was behind the existing ledger to about an inch above the deck surface. Make the outline large enough to include space for the deck boards on top the ledger and any trim boards on the sides. Union corrugating 14 in x 30 ft vinyl roll flashing. This flashing needs to extend up at least 2 or 3 inches up under the siding above the deck.

Slip the back flashing under the siding at least 3 at the top and the sides. Then slip flashing behind the siding covering the top edge of the ledger. Gap between the end of the ledger and the ends of siding and fill it with high quality exterior caulk to keep water from leaking behind the ends of the ledger. 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.

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. If nails are in the way pull them out. 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. 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.

Install z flashing behind the bottom of the ledger and over the siding below.