Thanks Dan this is what I fear that it is differential expansion of the roof itself because I have no easy fix. Any one know of a sound camera?
--- On Mon, 8/30/10, Exeltech <exelt...@yahoo.com> wrote: > From: Exeltech <exelt...@yahoo.com> > Subject: Re: [RE-wrenches] roof noise after solar install. > To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> > Date: Monday, August 30, 2010, 1:47 PM > Darryl, > > The problem can also be caused by uneven heating of the > roof. I lived in an off-grid house for eight > years. It too suffered creaks and groans such as you > describe, but mostly on warm, sunny days. Noise wasn't > a problem during the winter or in cloudy weather. The > issue was resolved when the PV were moved off the roof and > put on pole-mounts (for reasons other than the noise > issue.) We know it was roof temperature and not the > racking because on close scrutiny over many weeks, we found > the noise originated in areas of the roof exposed to the > sun, away from the PV. Loosening the PV clamps and > letting the PV free-float on the racking had no effect on > the noise. Shading the exposed areas of the roof with > large flats of cardboard and all was quiet again. > > Just one more data point. Hope this helps... > > Dan > > --- On Mon, 8/30/10, Darryl Thayer <daryl_so...@yahoo.com> > wrote: > > From: Darryl Thayer <daryl_so...@yahoo.com> > Subject: Re: [RE-wrenches] roof noise after solar install. > To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> > Date: Monday, August 30, 2010, 1:23 PM > > This was built at one time, but on Tuesday I am going to > the site, > and I will look very carefully at the structure. > > > > > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > 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: RE-wrenches@lists.re-wrenches.org 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
