How to deal with perimeter nail base

Petr Glotov
Hi All, I'm in the process of installation of Klip-Rib roof system. The roof deck is T&G. I plan to install 6" of ISO on the top of the deck, then plywood, underlayment and metal panels. I am thinking what should I do with the perimeter. I need a strong perimeter as a nail base. I saw here that one solution is stacked 2x4's around perimeter, but in my case it would be 4 layers, which I don't think is an elegant structure - seems to be too massive with too many joints/seams. What are my alternatives here ? Thanks a lot. Petr
Petr Glotov
Another question: how many screws do I need to apply per plywood sheet ? I've heard in case of SIPs they apply 8 screws. Would it be enough for my case ?
An informed customer is our best customer.
2x8's ripped to the proper height when on end will give you the proper nailing edge.
Petr Glotov
Thanks, was glad to see I was going in the right direction :)
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