Hi Paul:
Well I do not know if I should stick my neck out but.....
As with all building stystems, the time between invention, initiation, and failure is a variable. As systems develop they are constantly being refined. The nature of an enclosure that relies on a seal that must withstand many forces and is yet untested by large spans of time will prove itself one-way or another eventually. I know in my own building career that theories of all systems have evolved to the point where we all realize that what we did ten years ago is at least outdated and perhaps even totally wrong.

I have never installed a gasket as you have suggested, but I have given a ventilated airspace to many structures both on sidewall and roof deck. Paranoia strikes deep. The purpose of this air space was to deal with the eventual failure of my own work and the chemistry involved.

The answer? No one else seems to have any ideas or they are staying away from the topic.

I am sure this thread will continue for years to come.