Regarding the walls, I had been contemplating applying a self adhesive membrane such as Ice and Water Shield to the exterior of the walls, commencing from the poured concrete basement walls to the eves.  

Regarding the roof, as with the exterior walls, I had been thinking of using a self adhesive membrane such as Ice and Water Shield to the exterior of the SIP’s.  Over the barrier, I was planning on installing 2 x 2 or 2 x 4 battens running with the roof pitch and installing 5/8” plywood over the battens, 30# felt and Ice and Water Shield over the eves and valleys and applying a good quality shingle over the top.

Al alternative would be to install to the battens as above and install a metal granulated shingle roof such as Gerard instead of the plywood and shingles as proposed above.   Any thoughts on these designs?

We are planning to build a single family residence in eastern Tennessee, a fairly wet area.  Although I am sold on SIP’s, I still have some uneasiness regarding moisture causing the OSB to rot.  My plan was to have all walls and roof panels constructed from SIP’s (8/12 pitch).  The walls would use 6” SIP’s and the roof 8” SIP’s.  The exterior walls will be finished with a brick veneer with a minimum 1”air gap between the SIP’s and brick with top vents and weep holes.  The interior seams of all sips will be taped.  An HRV is also mandatory in the desighn.

Regarding the walls, I had been contemplating applying a self adhesive membrane such as Ice and Water Shield to the exterior of the walls, commencing from the poured concrete basement walls to the eves.  

Regarding the roof, as with the exterior walls, I had been thinking of using a self adhesive membrane such as Ice and Water Shield to the exterior of the SIP’s.  Over the barrier, I was planning on installing 2 x 2 or 2 x 4 battens running with the roof pitch and installing 5/8” plywood over the battens, 30# felt and Ice and Water Shield over the eves and valleys and applying a good quality shingle over the top.

An alternative would be to install to the battens as above and install a metal granulated shingle roof such as Gerard instead of the plywood and shingles as proposed above.   Any thoughts on these designs?

Regarding my question regarding the design and my concerns over moisture on the SIP skins when I first posted, I see the problem with a non-permeable barrier installed over the walls and roof.  I believe that the Alaska article directed me to another article on liquid applied WRB’s.  I have done some additional reading on this material and wondered is anyone had any thoughts on the use of one of these products to protect the exterior of the SIP’s?  Based on what I read, these barriers have fairly high permeability, allowing the OSB to dry to the exterior while still providing the tightness needed for the structure.  These products can also be applied to both OSB and concrete, so I could apply it all of the way down to the brick ledge in the foundation wall.  Thanks for any comments regarding the use and performance of these products.