No not at all. From what I have been reading on this site there is a good experience contractor up your way that I believe is a mediator on this site who would be more inclined to answer your questions of building practices in your state, you might be able to give him a private massage. Atlantic Construction is his user name. Best of luck, and any other questions I will be more then happy to discuss with you. BOB
you should consider foam underlayment as an extension of the sheathing and pack out your windows the same thickness of the foam.
then you can integrate the window flashing to wrb properly tyvek
should always be directly under the siding