attaching a ledger to existing ledger

my deck will be five feet off the ground and at the moment there is an eight foot length of ledger already attached to the house beneath our patio door. Seeing i want the deck to be sisteen feet wide is it possible to attach the sixteen foot ledger board to the existing one that already has the vinyl cut out and then at the other end of the ledger, attach a stud post to the house to support the ledger where it will not be attached to the house cause of the vinyl siding. also the thickness of the existing ledger sticks out past the vinyl siding about half an inch. hope i have explained the problem enough

 

What you are proposing isn't going to fly. You have 2 choices.

One is to remove some of the vinyl siding, attach the ledger to the house, J-channel around the ledger and reinstall the vinyl siding.

The other is to make the deck free-standing and leave the vinyl siding alone.

Regardless of which way you opt to go, the deck is 5' above grade, which means you'll need a permit to expand it. Not a big thing. but it'll be built in a way that your inspector will approve. (Follow the span tables, proper footings, etc.)

 

Lefty is correct. If you aren't sure how to handle the siding, you should be able to look at how it was done for the existing ledger (adjacent to the patio door).

I would only add that you should flash the top of the ledger under the siding, to keep water from getting behind the ledger.

 

Are you extending the length 8 additional feet from one end of the existiing ledger? If so, I would suggest cutting out enough siding to install another 8 foot ledger at the end of the present one. Cut enough to allow room to install J-channel and flashing. Leave 1 1/2 inch space at the end of the new ledger to allow nailing of the end joist into the end of the ledger. Install J-Channel and flashing before installing the ledger.