[RE-wrenches] The perfect solar ready roof

[Chris Daum]

Dear Wrenches:
 
I have a composite (shingle) roof at hand, and the owner wants to upgrade it
to a metal roof and install a 5kw+ array on it.   The rafters are those
(sort of) particle board I-beams covered with 1/2" plywood (and shingles).
What's the best metal roofing you could suggest--and would you beef up the
wood to lag into?
 
Thanks for all your input.
 
Chris Daum
Oasis Montana Inc.
406-777-4309 
406-777-0830 fax
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