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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,167
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I designed and built mine.
I bought 2' wide Stainless sheets, turned-up the long edges 3/4" in on both sides, and dropped them in between the joists (2' oc). The turned-up 'flange' nailed to the side of the joist, with the whole panel sloping down to the gutter.
TO keep water from leaking along side the joists I made joist 'roofs.' --On top of the joists, and under the decking, copper flashing ~10" wide. Centered and bent along the top of the joist --just ~30° downward bend. --the copper is soft, and easy to bend inplace.
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong.
Disclaimer: the above was 2¢ worth.
More information is available as my professional opinion, which is provided for an exorbitant fee. 
Last edited by island911; 09-04-2009 at 10:55 AM..
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