I came across a deck today that had the ledger board bolted to the foundation blocks. There was no visible flashing and I researched that it is acceptable to put a bead of caulk along the top of the ledger board but that is not visible either since there is deck board installed above it. They applied a scratch coat of mortar after the deck installation and essentially sealed the bottom of the ledger board and the top of the stairs.
Does this appear to be an acceptable installation, I would think if nothing else that board would rot very quickly? Are the numerous moisture marks a result of the installation or common on mortar scratch coats and just drying out more slowly under the deck since it receives no sun?
Thanks in advance!