[RE-wrenches] The perfect solar ready roof

[benn kilburn]

chris,don't forget to make sure that the existing roof structure is engineered to support the added weight of the extra layer of plywood, as well as the racking/modules.
benn
DayStar Renewable Energy Inc. benn at daystarsolar.ca780-906-7807 HAVE A SUNNY DAY







> From: chris at OasisMontana.com
> To: re-wrenches at lists.re-wrenches.org
> Date: Wed, 20 Oct 2010 19:29:33 -0600
> Subject: Re: [RE-wrenches] The perfect solar ready roof
> 
> Hi Dick:
> 
> Nope, not just high wind area, but the site gets a real bashing of hail at
> least once every 3 to 4 years (like quarter sized hail at 60 - 80 mph) -- so
> I will pass on the plasticky amorphous stuff, thank you, although yes, they
> do look nice (til they get those whitish translucent spots from hail).
> There's room for about a 5.5KW array of some decent modules (read: Sanyos or
> some other high efficient modules).  I just think we need another layer of
> roofing material; we'll need 16 sheets of some kinda plywood.  I am leaning
> more and more in that direction.....
> 
> But I really do appreciate all your thoughts!  And by the way, right NOW,
> sunny day time temps are near 70.....  Nights are a chilly 35.....
> 
> Chris Daum
> Oasis Montana Inc.
> 406-777-4309
> 406-777-0830 fax
> 
> -----Original Message-----
> From: re-wrenches-bounces at lists.re-wrenches.org
> [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Richard L
> Ratico
> Sent: Wednesday, October 20, 2010 6:59 PM
> To: re-wrenches at lists.re-wrenches.org
> Subject: Re: [RE-wrenches] The perfect solar ready roof
> 
> Chris,
> 
> You've probably already considered and rejected this... Unisolar PVL modules
> on standing seam roofing. Solves the structure & wind problems. Goes fast if
> installed on the pans before they go on the roof. Price is pretty good per
> watt now.
> Can't beat the look. Made in USA. I think the only downside is you may not
> have enough area to place 5kW. 
> 
> I bet it's getting cold in Montana. You could stick the modules on the pans
> in a heated space somewhere. This would really cut down your time and
> exposure on the roof.
> 
> Dick Ratico
> Solarwind Electric
> 
> 
> 
> --- You wrote:
>  Dear Wrenches
>  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
> --- end of quote ---
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