What is a Ledger ?

Definition of Ledger in Construction
Refers to a horizontal support piece normally installed to support the ends of a structural component for a deck, a porch, or other structural system.

Commonly installed to a concrete wall, or other vertical wall system, the ledger is provided to provide a bearing point for other structural members. The proper installation of a ledger is important to the stability and structural integrity of structural systems. In many cases the installation of flashing is required in the back of the ledger, to ensure that the ledger will not be negatively influenced by moisture and or water. The replacement of rotten ledgers on existing homes is a common structural repair on many existing decks and overhangs. Incorrectly installed ledgers were in many cases, simply nailed into the wall systems, without flashings or proper anchoring. These ledgers have failed and now provide interesting work for home renovation contractors.