Ok, so before going great guns on bolting my deck ledger to the house I figured I should double check that my house does indeed have a rim joist. The attached photo shows what I found. 1/2" sheathing, then 1" more of what seems to be chip board. I am posting here in the desperate hope this might be some sort of engineered joist I can bolt my ledger to. If that seems unlikely I will have to change my design to free standing. I notice some other homes in my development all built by the same builder have decks with attached ledgers so I am holding out hope. In fact, where this deck is going there was a smaller deck that my builder constructed when the house was new. It was bolted to this "rim joist", but it was small so did not need to be up to code.
By the way, if it helps, this house is 5 years old.
Thanks.
-Eric
By the way, if it helps, this house is 5 years old.

Thanks.
-Eric