A deck ledger board is used when attaching a deck to a house. It supports both the deck joists, as well as bolsters the framing of the deck. If your deck is attached to your house (and not a free-standing deck), you’ll also need deck flashing, which serves as a barrier against moisture from getting into the house through any openings made while attaching your ledger board.If you’re building a deck that’s attached to a house, learning about deck flashing installation and proper ledger board attachment is essential to creating a structurally sound deck that you can safely enjoy for years to come. If you are building a deck yourself, browse through our collection of articles to learn more about the process of adding a deck to a house and building a strong, stable connection, ledger board flashing, how to attach a ledger board to a house, and more.