![]() The best way to think about it to visualize what a drop of water will do as it hits the deck and moves towards the house. As you can see from the diagram and the photo flashing must be done in layers. The intersection of the house and deck is extremely vulnerable to moisture problems. The problem with attaching a deck to the house is it creates a great area to collect water. However, there are some details that must be followed in order to prevent premature failure of your deck and the area of your house that it’s attached to. Properly flashing a deck ledger seems to be a lost skill with most weekend warriors. Lately I’ve been seeing problematic deck ledger flashing details so I’d like to share with you my perspective on how to properly flash and secure your deck to the house. Here's a rundown of the materials.ĭeck Ledger Board Flashing Detail. Attaching a deck ledger board to a vinyl-sided house requires a few extra trim pieces to keep water from leaking behind the siding.The deck flashing needs to overlap the deck. : Installing a deck flashing properly is critical to keep water from getting behind the ledger board. ![]() How to Replace Deck Ledger Flashing: Tear off the HardiPlank lap siding and install new flashing to prevent ledger board rot. By Todd Fratzel on Decks & Porches, Framing. ![]()
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