[RE-wrenches] roof noise after solar install.

[Darryl Thayer]

Sorry so slow getting back, I put answers int questions
Thanks Matt

--- On Mon, 8/30/10, Matt Lafferty <gilligan06 at gmail.com> wrote:

> From: Matt Lafferty <gilligan06 at gmail.com>
> 
> Darryl,
> 
> No answers. Just questions in search of answers.
> 
> Is this a single-layer comp roof? Yes
> Did the noises begin immediately after the install? YES (as far as I know)
> Were there any questionable structural issues noted during
> install? No
> Is it possible that one or more bolts aren't completely
> tightened? (Take a
> good look at your footing to rail connections.)I will look again but it is hard to see under modules)
> Can you get into the attic and inspect the rafters/trusses? Yes I did
> (Make sure you
> don't have a busted rafter) I will double check
> What was the temperature during install compared to normal
> daytime highs It was warm, maybe 90F
> when it's making all this racket? (I've heard of
> winter-installs making
> noise during the summer)Just finished the install so summer and summer noises
> What does it sound like from outside the house? (i.e. is
> the pitch or tone of the sounds very different)  I will listen on Tuesday
> Can the source of the sound be isolated to one point or
> region? (i.e. only
> on the longest rails)not so far
> What is the temperature range like on the days it's being a
> nuisance? (i.e.
> 45-95, or 55-85, etc.) We have typically been 55 at night and 90 during the day ((not roof temperature of course)) 
> Are these jumbo modules? (large modules have greater
> absolute expansion
> between attachments than smaller modules) No normal size
> 
> When you go out there, be prepared to install a pair of
> expansion splices
> for each long rail set, but don't expect that to be the
> silver bullet.
> Unirac says you only need them every 45 feet. If your
> situation is under
> 30', I expect you have another problem. Installation manual
> here:
> http://www.unirac.com/pdf/ii908.pdf
> 
> Pray for silent roofs,
> 
> Matt Lafferty
> 
> From: Darryl T
> Subject: [RE-wrenches] roof noise after solar install.
> 
> New roof asphalt shingle, 5.1 kW system, string inverter
> makes roof noises
> in the morning, and afternoon particularly after dark 
> 
> Creek and crack it finally stops late at night but restarts
> late morning and
> stops mid afternoon most days then intensifies after
> dark.  Timing seems to
> follow temperature,  has customer freeked
> 
> Longest tun is 30 feet Unirack rail with top down
> clamps.  
> Darryl
> 
> 
> _______________________________________________
> List sponsored by Home Power magazine
> 
> List Address: RE-wrenches at 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
> 
>