Maintenance Guides / Exterior & Structure

Inspect deck ledger flashing

Difficulty: moderateTime: 45 mins

Why it matters

Failed ledger connection is the #1 cause of deck collapse. Water infiltration rots rim joists and causes structural failure.

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How to do it

  • 1

    Access the area behind the ledger board where it attaches to the house.

  • 2

    Look for metal flashing installed under the ledger board.

  • 3

    Check for gaps between the flashing and ledger; water infiltration causes rot.

  • 4

    Inspect for rust, corrosion, or missing fasteners in the flashing.

  • 5

    Look for water stains, soft wood, or mold indicating prior rot.

  • 6

    If flashing is missing or damaged, or if rot is present, call a contractor.