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"Tim Wescott" wrote in message

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Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Living in the great NW does present it's problems. Grant gave you the
right answers . Trying to save a frigged up job is throwing your money
away. Get a roof system that is held down by edge clips that are totally
covered by the standing seam of the next panel. The only screw through the
surface would be what is called a drag screw, keeps the panel from sliding
off and it is covered up by the ridge flashing when the roof is finished.
Accept no substitutes !! I have that style roof on my shop and if my memory
serves me, it might have a 20-25 year life.

Ed Angell