I recently had a deck built on my new house. Now when it rains water enters my basement near my patio door. I've attached a picture of the area that leaks near the door and a close up of the same area.
There is a piece of flashing above the ledger board, but the contractor has nailed through it (I'm not sure if that matters). There is no additional flashing or tar paper behind the ledger board, just the house wrap. The flashing on top of the ledger is cut here to fit under the door and is barely higher than the deck boards.
The water problems in this area have me concerned about the quality of flashing all around the deck. The floor boards are nailed through the flashing and into the ledger board in every area. Additionally I've noticed the portion of the deck at the top of the stairs slopes towards the house.
I really have no idea what I should do near the door. Should I pry up the deck boards and try to re-flash it. Is there an easier way to fix it? What about the rest of the flashing? Is it OK even with the deck boards nailed on through it or does it need to be replaced? How big of a deal is it that the landing above the stairs is slightly sloped towards the house?
Edit to add more information and requested pictures:
The house was built approximately one year ago. The deck was added about seven months ago by a different contractor.
Here is a picture taken from under the deck by the door.
And here is a picture taken from inside the basement showing where water is entering the house.
When I sprayed water on the deck with a hose it began to come in when I hit near the door. Although based on where the wire is in the interior picture I think it's entering to the right of the door. I wasn't spraying the walls, so I don't think it is coming in from the outlet. Maybe it's flowing along the top of the flashing and finding a hole somewhere? I'm stumped honestly and not sure of the best course of action.