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<p>I have heard this too, no solar involved. Chris<br>
</p>
<div class="moz-cite-prefix">On 3/5/2025 12:05 PM, Tyrone Houck via
RE-wrenches wrote:<br>
</div>
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cite="mid:CAEqH54nMMEjBcSwUjxJSYS+oR+zf06E2ntH14DEakz4yBt_2RA@mail.gmail.com">
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<div dir="auto">
<p dir="ltr">Screw down metal roofs are notorious for
expansion/contraction issues...especially over long horizontal
spans. It's possible that the array is actually fixing that
section in place better than the rest of the roof(while
simultaneously keeping that part of the roof cooler) . I would
investigate the roof area adjacent to the array as it's likely
to be heating up much faster than the area shaded by the
array. Could be the sound of screws popping..</p>
<p dir="ltr">Best of luck!</p>
<div data-smartmail="gmail_signature">Tyrone Houck</div>
<div data-smartmail="gmail_signature" dir="auto">Oregon
Solarworks LLC</div>
<div data-smartmail="gmail_signature" dir="auto">CCB #204937 LRT
#076</div>
<div data-smartmail="gmail_signature" dir="auto">541-787-1366</div>
<div data-smartmail="gmail_signature" dir="auto"><a
href="mailto:tyrone@oregonsolarworks.com"
moz-do-not-send="true" class="moz-txt-link-freetext">tyrone@oregonsolarworks.com</a><br>
</div>
</div>
<div data-smartmail="gmail_signature"><br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Mar 5, 2025, 8:48 AM
Jason Szumlanski via RE-wrenches <<a
href="mailto:re-wrenches@lists.re-wrenches.org"
target="_blank" rel="noreferrer" moz-do-not-send="true"
class="moz-txt-link-freetext">re-wrenches@lists.re-wrenches.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div dir="ltr">
<div><span class="gmail_default"
style="font-family:arial,helvetica,sans-serif">They
report that it is definitely coming from the roof and
from opposite ends of the array. It's pretty random,
but only earlier in the day and later in the day,
which suggests the array and roof are heating and
cooling. I don't believe it is electrical.</span><br
clear="all">
</div>
<div><span class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</span></div>
<div><span class="gmail_default"
style="font-family:arial,helvetica,sans-serif">But it
is interesting that you mention siding. Just before we
installed solar panels, they had their house re-sided
with hardy board siding. I suggested that maybe it was
coming from the siding on the gable ends, but of
course, they insisted that it only started when the
solar panels were installed. I did find a piece of
siding that was pressed up tight against a drip edge,
and I found that to be a possible source. Without
being there on the roof as it happens, it's hard to
diagnose. They are reporting 1-2 dozen pops a day that
they can hear clearly. I don't doubt that, but I
question whether it is directly related to the solar
panel installation.</span></div>
<div><span class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</span></div>
<div><span class="gmail_default"
style="font-family:arial,helvetica,sans-serif">For
more context, they also reported something that
sounded like banging in high winds, like a solar panel
was loose. All of the panels were later found to be
completely secure. I found a piece of aluminum soffit
cover that was loose and could have been flopping
around, but again, it's hard to tell when you are not
there.</span></div>
<div><span class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</span></div>
<div><span class="gmail_default"
style="font-family:arial,helvetica,sans-serif">They
are wrapping themselves all around the axle, probably
thinking that we did something wrong. They even called
S-5 behind our backs to see if the manufacturer could
throw us under the bus. That turned out to be a fun
discussion because S-5 suggested the them that adding
more seam clamps might help. Of course, SolarFoot is
not a seam clamp at all, which further confused the
owner.</span></div>
<div>
<div dir="ltr" class="gmail_signature">
<div dir="ltr"><br>
Jason Szumlanski
<div><span
style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Principal
Solar Designer | Florida Solar Design Group</span><br
style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">
<span
style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">NABCEP
Certified Solar Professional (PVIP)</span><br
style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">
<span
style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Florida
State Certified Solar Contractor CVC56956</span></div>
<div><font color="#333333"
face="Roboto, RobotoDraft, Helvetica, Arial, sans-serif">Florida
Certified Electrical Contractor EC13013208</font></div>
</div>
</div>
</div>
<br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Mar 5, 2025 at
8:51 AM Dave Tedeyan via RE-wrenches <<a
href="mailto:re-wrenches@lists.re-wrenches.org"
rel="noreferrer noreferrer" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">re-wrenches@lists.re-wrenches.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">Jason,
<div>You mentioning popping sounds reminds me of two
separate systems that I was called in to service
recently where the homeowner was reporting popping
sounds. These were coming from the ground, not the
roof, so it may not apply. Both systems were roughly
10 years old, and the original installer used PVC
conduit off the roof. Water had been getting into
the conduit and running down to the combiner
(Enphase system). Things were quite corroded in the
combiner panels and the sounds were coming from a
failing breaker. It sounds like your system is
newer, but maybe there is a bad breaker? In one case
the customer was certain the noise was coming from
the meter, but upon inspection I am nearly certain
it was the combiner instead. These were more of an
"electronic" popping noise though. If your popping
noise is more structural have the customer listen
out to see if it happens right when the sun comes
out from a cloud, or goes behind a cloud. With vinyl
siding or metal roofs, I'll sometimes hear the
expansion and contraction but it has to be a very
quick change in temperature and I only hear it on
those quick transitions from sun to clouds.</div>
<div><br>
</div>
<div>Good luck tracking it down!</div>
<div>Cheers,</div>
<div>Dave</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Mar 5, 2025
at 8:12 AM Jason Szumlanski via RE-wrenches <<a
href="mailto:re-wrenches@lists.re-wrenches.org"
rel="noreferrer noreferrer" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">re-wrenches@lists.re-wrenches.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="auto">I had a person contact me years ago
who said her solar installer put a system up that
caused popping noises everyday on her roof. It was
a shingle roof, older home, and ultimately we
chalked it up to expansion and contraction.
Everything was secure and there were no
indications of structural, cosmetic, or waterproof
integrity being jeopardized.
<div dir="auto"><br>
</div>
<div dir="auto">That was my only experience with
this issue until we did a recent installation on
a 5V exposed fastener metal roof using S-5
SolarFoot mounts attached through the metal into
the plywood decking only. This new client is
reporting numerous loud popping sounds every
day. Based on the time of day and weather, it
must have something to do with expansion and
contraction, but we cannot pinpoint the problem.
Of course, the day we go to try to duplicate the
issue, there were no sounds at all that we could
detect up on the roof after waiting hours in
observation. </div>
<div dir="auto"><br>
</div>
<div dir="auto">We did have one row of 13 panels
mounted in portrait that was on the longer side,
so we decided to split the rail by putting a gap
in the middle. That, apparently, has not solved
the issue. </div>
<div dir="auto"><br>
</div>
<div dir="auto">We have checked the torque on
every single fastener in the system. This
installation is no different than many many
others we have done using the same materials on
the same roof type. </div>
<div dir="auto"><br>
</div>
<div dir="auto">Has anybody experienced similar
issues, and how did you go about addressing
them? </div>
<div dir="auto"><br>
</div>
<div dir="auto">Jason Szumlanski </div>
<div dir="auto">Florida Solar Design Group </div>
</div>
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<pre class="moz-signature" cols="72">--
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ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
(401) 447-5773</pre>
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