low slope metal roof perpendicular to shingles w/ differnet pitch

I am an architect with a residential client who wants me to use a standing seam metal roof, 1:12 pitch, that will run perpendicularly into a 4:12 shingled roof. I cannot imagine how one would flash this valley considering the wind, snow and rain in our climate. Can anyone help?
Todd Miller
Isaiah Industries, Inc.
5/6/2013
This can be flashed but the critical thing is making sure the standing seam is a mechanically seamed standing seam. The transition flashing needs to start fairly high on the roof so as to maintain a positive pitch. If you wish, email me direct with any drawings you have and I can sketch a transition flashing, [email protected]
Eric Novotny
An informed customer is the Best Customer!
5/8/2013
+1 Drawings or pics will help.

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