<div dir="ltr">Benn,<div><br></div><div>To answer your (good) question one way, I won't speak for PV without flashings, but with literally tens of thousands of solar pool heating systems installed by all dealers that don't use flashings just in tiny Southwest Florida over the past 40 years, each system with upwards of 40 attachments with 1/4" lag screws, many with sub-par sealants, statistically we would have seen drastically more problems, and we haven't. Roof leaks are exceedingly rare and minor. Granted, it's not the same as PV in many ways, so I would be careful about drawing any conclusions.<div><br></div><div>I wish there was a better way for solar pool heat, but even the cheapest flashings can add 10-15% to a project, making it non-competitive in a very tight market, and metal flashings could cut into the polymer panels very easily. The "tried and true" method has been too successful to stray from.</div><div><br></div><div>I'm sure there are unique experiences from around the country with snow, freeze/thaw cycles, expansion/contraction, and other phenomenon that could differ drastically from place to place. Maybe we're trying to shoehorn a single solution into a problem that has more than one answer.</div><div><br></div><div>Jason Szumlanski</div><div><div><div class="gmail_extra"><div><div class="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><span><br><div dir="ltr" style="margin-left:0pt"><br></div></span></div></div></div></div></div></div></div></div>
<br><div class="gmail_quote">On Fri, Aug 28, 2015 at 3:43 PM, Benn Kilburn <span dir="ltr"><<a href="mailto:benn@skyfireenergy.com" target="_blank">benn@skyfireenergy.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div style="font-family:trebuchet ms,sans-serif">Here is a devils advocate question for everyone (<u>including myself</u>) who is claiming "no leaks after x-years".<br><br></div><div class="gmail_extra">Are we assuming "no leaks" because the home/system owner has not reported any or because there are no water stains on the ceilings below the arrays *or* are we actually looking in the attic and seeing that there are absolutely NO water marks where the attachment points are? <br>I would think that there is a big difference? But having not gone back to every install and actually getting up and looking around <u>inside the attic</u>, would it not be presumptuous to assume that there have been no leaks?<br><br clear="all"><div><p style="font-size:13px;margin:0px;padding:1em 0px;text-align:justify;color:rgb(0,0,0);font-family:helvetica,sans-serif;line-height:18px"></p><div style="text-align:left"><b style="margin:0px;padding:0px">Benn Kilburn <span style="font-size:9px"></span></b></div>
<div style="text-align:left">CSA Certified Solar Photovoltaic Systems Electrician, SkyFire Energy Inc</div><div style="text-align:left">6706 – 82 Ave NW | Edmonton, AB | T6B 0E7</div><div style="text-align:left">P: <a href="tel:780-474-8992" value="+17804748992" target="_blank">780-474-8992</a> | F: <a href="tel:888-405-5843" value="+18884055843" target="_blank">888-405-5843</a> | <a href="http://www.skyfireenergy.com/" style="margin:0px;padding:0px;color:rgb(240,140,0);text-decoration:none;border-width:0px;border-style:none" target="_blank">www.skyfireenergy.com</a></div>
<br></div><span class="">
<br><div class="gmail_quote">On Wed, Aug 26, 2015 at 1:52 PM, <span dir="ltr"><<a href="mailto:max@seesolar.com" target="_blank">max@seesolar.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"><div dir="ltr"><span>I remember the "early days" of installing, which for us was early 1990's. We used stainless steel rod hangers straight into rafters, which left us with 4" threaded rod sticking up out of the roof. We used thru the roof for sealing under a nut and fender washer. I've visited a couple of those sites recently (still no leaks after over 25 yrs of production). By the way, we have changed our mounting methods since then.........</span></div><div dir="ltr"><span><br></span></div><div><span style="font-family:tahoma,'new york',times,serif">Max Balchowsky</span><br style="font-family:tahoma,'new york',times,serif"><span style="font-family:tahoma,'new york',times,serif">Design Engineer</span><br style="font-family:tahoma,'new york',times,serif"><span style="font-family:tahoma,'new york',times,serif">Golden Bridge Development</span><br style="font-family:tahoma,'new york',times,serif"><span style="font-family:tahoma,'new york',times,serif">1048 Irvine Ave Suite 217</span><br style="font-family:tahoma,'new york',times,serif"><span style="font-family:tahoma,'new york',times,serif">Newport Beach, Ca. 92660</span><br style="font-family:tahoma,'new york',times,serif"><span style="font-family:tahoma,'new york',times,serif"><a href="tel:760-403-6810" value="+17604036810" target="_blank">760-403-6810</a></span></div><div style="font-size:13px;font-family:tahoma,'new york',times,serif" dir="ltr"><font size="1">"Building a Better Future For The Next Generation"</font></div></div></div></blockquote></div></span></div></div>
<br>_______________________________________________<br>
List sponsored by Redwood Alliance<br>
<br>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br>
<br>
Change listserver email address & settings:<br>
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" rel="noreferrer" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>
<br>
List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" rel="noreferrer" target="_blank">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a><br>
<br>
List rules & etiquette:<br>
<a href="http://www.re-wrenches.org/etiquette.htm" rel="noreferrer" target="_blank">www.re-wrenches.org/etiquette.htm</a><br>
<br>
Check out or update participant bios:<br>
<a href="http://www.members.re-wrenches.org" rel="noreferrer" target="_blank">www.members.re-wrenches.org</a><br>
<br>
<br></blockquote></div><br></div></div></div></div></div>