Thanks Ray, my response compared the parapets to the snow dam under the modules too.
On Thu, Aug 5, 2010 at 5:06 PM, R Ray Walters <[email protected]> wrote: > I'd say that at this point, with all the old solar systems, flat roofs, and > snow we get in New Mexico and Colorado, that if it hasn't been a problem, it > won't be a problem. > It definitely is not going to lift the panels; worst case is that it could > build up and get past flashings, which is a problem on flat roofs whether > they have solar or not. > I've seen this most with roofs with parapets: the snow in the shade of the > parapets builds up and gets higher than the corner flashings, starting a leak. > Obviously solar won't be installed in these shaded areas, so I think its fair > to say the solar is not going to make anything worse, and it might actually > help a little. > > R. Walters > [email protected] > Solar Engineer > > > > > On Aug 5, 2010, at 1:47 PM, Lee Bristol wrote: > >> Wrenches, >> >> Has anybody come across an analysis of the potential damage to a flat >> roof from snow on solar modules melting to form an ice layer on the >> roof and then forming subsequent layers as more snow melts or slides >> down the modules? If the sheet gets thick enough then the next bit of >> water could form ice layer under edge of panel and lift it up. Seems >> very unlikely to me but the prospect has questions....and prospect >> questions must be answered. >> >> Thanks! >> >> Lee >> >> -- >> Lee Bristol >> NABCEP Certified Solar Designer/Installer >> >> Chief Technology Officer >> Standard Solar, Inc. >> 1355 Piccard Drive >> Rockville, MD 20850 >> (301) 944-5105 >> (240) 479-1510 (c) >> www.standardsolar.com >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: [email protected] >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> >> > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > -- Lee Bristol NABCEP Certified Solar Designer/Installer Chief Technology Officer Standard Solar, Inc. 202 Perry Parkway, #7 Gaithersburg, MD 20877 (301) 944-5105 (240) 479-1510 (c) www.standardsolar.com _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
