<div>I've found that the Flashed L-Foot connection costs about $0.10/w on a typical residential system, and only adds about 1/4-1/2" to the height, which can be minimized using the slotted holes in a typical L-Foot. We need a lot of attachments for 172 mph design wind speeds around here. Flashings at $500 for a 5kW seems high, especially now as the percentage of the system price increases. That being said, I would install L-Foot flashings on my own roof - no exceptions.</div>
<div><br></div><div>On the other hand, I've seen sealed lag screw connections work with solar pool heating systems for decades without indication of problems. A variety of sealants were used in the "old days" but most recently Sikaflex 1A (which incidentally is not indicated for asphaltic roofs) and Geocell 2300 have worked great.</div>
<div><br></div><div>My 10 cents, :)</div><div><br></div>Jason Szumlanski<div>Fafco Solar</div><div><br></div><br><div class="gmail_quote">On Fri, Jun 29, 2012 at 10:49 AM, jay peltz <span dir="ltr"><<a href="mailto:jay@asis.com" target="_blank">jay@asis.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">I have had the opportunity in the past few years to learn a lot about good roofing waterproofing practices according to the national roofers association.<div>
<br></div><div>They don't agree that caulk works as the primary means of sealant, which is what you are doing with an L foot.</div><div><br></div><div>And given that we have really good off the shelf approved flashed feet, why would you use anything else?</div>
<div><br></div><div>My 2 cents,</div><div><br></div><div>Jay</div><div><br></div><div>peltz power</div><div><br></div><div><br><div><div><div>On Jun 29, 2012, at 5:16 AM, Glenn Burt wrote:</div><br></div><blockquote type="cite">
<span style="border-collapse:separate;font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:medium"><div lang="EN-US" link="blue" vlink="purple">
<div><div><div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">We have used a variety of sealants over the years, and determined simple Henry roofing cement is the best product for use on comp roofing.<u></u><u></u></span></div>
<div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></div>
<div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">We also used to bend our own L-foot flashing, which we cut from standard Al coil stock (before all the manufactured options were available). This might be a good option for you in this case.<u></u><u></u></span></div>
<div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></div>
<div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></div>
<div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></div>
<div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Glenn<u></u><u></u></span></div>
<div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></div>
<div><div style="border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;border-color:initial;border-top-style:solid;border-top-color:rgb(181,196,223);border-top-width:1pt;padding-top:3pt;padding-right:0in;padding-bottom:0in;padding-left:0in">
<div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><b><span style="font-size:10pt;font-family:Tahoma,sans-serif">From:</span></b><span style="font-size:10pt;font-family:Tahoma,sans-serif"><span> </span><a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" style="color:blue;text-decoration:underline" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a><span> </span>[mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>]<span> </span><b>On Behalf Of<span> </span></b>Drake<br>
<b>Sent:</b><span> </span>Thursday, June 28, 2012 6:40 PM<br><b>To:</b><span> </span>RE-wrenches<br><b>Subject:</b><span> </span>[RE-wrenches] L feet no flashing in shingle roof<u></u><u></u></span></div></div></div><div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt">
<u></u> <u></u></div></div><div><div><div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt">I'm quoting a job that has an existing array with L feet bolted down to a shingle roof with no flashings. I want to match the height of the existing array. Also some modules are being worked in around skylights where it is unlikely that room would be available for flashings to center over rafters.<br>
<br>I've always used flashings. Would it be completely crazy to follow suit of the existing array and bolt L feet straight to the shingle roof with good roof sealant? If so, how would you seal it?<br><br>Thanks,<br>
<br>Drake<span> </span><br><br><u></u><u></u></div><p style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-size:10pt">Drake Chamberlin <span> </span><br>
ATHENS ELECTRIC LLC<br>OH License 44810 <br>CO license 3773<br>NABCEP Certified PV</span><u></u><u></u></p></div></div></div><br></div></span></blockquote></div><br></div></div><br>_______________________________________________<br>
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