[RE-wrenches] The perfect solar ready roof

[Scott McCalmont]

In general, you shouldn't drill or cut the flanges on engineered wood beams. I think that eliminates lag screws into the rafters. They probably wouldn't have the same pull-out strength as a lag screw into a conventional rafter, either.

Scott

On Oct 19, 2010, at 7:58 PM, Chris Daum wrote:

> 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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