[RE-wrenches] White Roof Temperature
You folks might find this of interest. Best, Chris Daum Oasis Montana Inc. ___ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
Re: [RE-wrenches] White Roof Temperature
I did some infrared tests years ago on metal vs comp,vs TPO this along with color, attic temps. As an example regular comp roof (Dark color non reflective) in clear sun, gable end vented rafters and plywood temps were 135 degrees and under the modules a foot away was 85 Degrees, so in short it will not really matter what is under the modules as long as there is ventilation AKA air gap between the array and the roof, the attic will be much cooler. As I am sure you all know steel gets colder in the winter then comp and hotter in the summer but when you shade the roof it basically does not matter what you are using. I do suggest going into customers' attic during the day with a IR camera or gun and you can see with good detail the shade of the modules, even the conduite on the roof, plus the attic temp being cooler under the modules. In 2017 we tested homes in Honolulu that were getting a white silicone coating over an asphalt roof, you could see in the attic where they were coating in real time and the results were incredible. Jerry NABCEP PV Inspector On Thu, Aug 25, 2022 at 10:39 AM Drake Chamberlin via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Hello Wrenches, > > A client installed a beautiful white standing seam roof. Suddenly their > air conditioning loads dropped way down. > > We were planning to put an array on the roof, but she is concerned that > the roof would become much hotter with dark colored solar modules over > it. > > Is there any data on this issue? > > Thank you, > > Drake > > Drake Chamberlin > Athens Electric LLC > Ohio Electrical Contractor’s License 44810 > CO Master Electrician’s License 4526 > NABCEP Certified PV Installation Professional > > > -- > ___ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > ___ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
Re: [RE-wrenches] White Roof Temperature
Perhaps this: https://jacobsschool.ucsd.edu/news/release?id=1094 Larry Crutcher Starlight Solar Power Systems On Aug 25, 2022, at 11:37 AM, Drake Chamberlin via RE-wrenches wrote: Hello Wrenches, A client installed a beautiful white standing seam roof. Suddenly their air conditioning loads dropped way down. We were planning to put an array on the roof, but she is concerned that the roof would become much hotter with dark colored solar modules over it. Is there any data on this issue? Thank you, Drake Drake Chamberlin Athens Electric LLC Ohio Electrical Contractor’s License 44810 CO Master Electrician’s License 4526 NABCEP Certified PV Installation Professional -- ___ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org ___ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
[RE-wrenches] White Roof Temperature
Hello Wrenches, A client installed a beautiful white standing seam roof. Suddenly their air conditioning loads dropped way down. We were planning to put an array on the roof, but she is concerned that the roof would become much hotter with dark colored solar modules over it. Is there any data on this issue? Thank you, Drake Drake Chamberlin Athens Electric LLC Ohio Electrical Contractor’s License 44810 CO Master Electrician’s License 4526 NABCEP Certified PV Installation Professional -- ___ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
