The deck boards have been depicted with a gap between the first board and the house only to emphasize flashing overlapping the ledger.
Attach an awning ledger board to a house.
Attach 2x6 rafters to the house with joist hangers and or supported by the ledger board.
On site the first board would be positioned within 1 2 from the wall flashing.
Locate a position for a header or ledger board.
Temporarily nail or brace the ledger in place positioned and leveled at the desired height.
How to attach a header board to a house for a porch roof.
1 2 carriage or cap bolts.
My approach is to apply a self adhering self sealing membrane to the wall where the ledger will be installed that extends at least an inch above the top of the ledger two inches below and four inches past the ends.
Remove the shingles or siding in the area identified for the header board.
It s a code compliant structural wood screw engineered to fasten a deck ledger board to the rim joist of a house with no pre drilling.
The lags should pass through by at least 1 2 on the back side of the band board.
If necessary use a sliding bevel to determine angles needed where the rafters will meet the ledger board.
If it is impossible to attach the ledger to a floor joist then fasten the ledger to wall studs which are generally located on 16 inch or sometimes 24 inch centers and doubled up around doors windows and other openings.
These replace lag screws and through bolts have been coated with a proprietary three step coating process that protects against corrosion even in pressure treated wood and are acq approved.